EPTEMBER 5, 7:22 P.M.

WASHINGTON, D.C.

“Dead?”

Gray sat on the edge of the desk in the museum’s storage room. He knew the pain of what he had to tell her. Elizabeth Polk slumped in the chair, collapsed within her lab coat. There were no tears. Shock locked them away, but she took off her slim eyeglasses, as if readying herself.

“I heard about the shooting on the Mall,” she mumbled. “But I never thought…” She shook her head. “I’ve been in the cellars here all day.”

Where there was no cell phone reception, Gray noted silently. Painter had mentioned trying to reach Polk’s daughter. And she was right across the Mall the entire time.

“I’m sorry to press you on this, Elizabeth,” he said, “but when did you last see your father?”

She swallowed hard, starting to lose control. Her voice quavered. “I…I’m not sure. A year ago. We had a falling-out. Oh, God, what I said to him…” She placed a hand on her forehead.

Gray read the regret and pain in her eyes. “I’m sure he knew you loved him.”

Her eyes flashed to him, going harder. “Thank you for your words. But you didn’t know him, did you?”

Gray sensed the tough core hidden behind that mousy, bookish exterior. He faced her anger, knowing it was directed inward rather than at him. Kowalski had retreated to the far side of the room, plainly uncomfortable with the whole scene.

Gray twisted where he sat and pointed to the desktop. The rows of ancient coins still lined a paper blotter there. “I know because we found a coin on your father’s body.” Gray recalled what Painter had told him about it. “A coin with the bust of Faustina the Elder on one side and the Temple of Delphi on the other.”

Her eyes widened. She stared down at the gap in the row where the coin once lay.

Gray lifted an arm. “He came here before he was shot. To your office.”

“It’s not my office,” she mumbled, glancing around, as if searching for the ghost of her father. “I’m doing research for my doctoral dissertation. In fact, it was my father who pulled some strings and got me this graduate position at the Delphi Museum in Greece. I’d been out there until a month ago. I’m overseeing the installation of this exhibit. I didn’t think my father knew I was here. Especially after our—” She waved away what she was going to say next.

“He must’ve been keeping tabs on you.”

A few tears did flow, just enough to trickle down one cheek. She brusquely dabbed her face with the sleeve of her lab coat.

Gray gave her a moment. He stared over at Kowalski, who was walking in a bored circle around the stone omphalos, like a slow orbiting moon. Gray knew Elizabeth’s father had followed that same orbit. But why?

Elizabeth voiced the same question. “Why did my father come here? Why did he take the coin?”

“I don’t know. But I’m fairly certain your father knew he was being tracked, hunted.” He pictured Polk haunting the edges of the Mall, seeking some way of contacting Sigma in person, staying hidden. “He might have taken the coin in case he was murdered. The coin was grimy, easy to miss in a pocket if the assailant did a cursory search of the body. But a more thorough exam at a morgue would’ve revealed the strangeness of the coin. I think he hoped it would lead here. To this office where he would’ve known you’d report it stolen.”

The woman’s tears had dried as he spoke. “But why would he do that?”

Gray closed his eyes, thinking hard, putting himself in the man’s shoes. “If I’m right about the coin, your father was worried he would be searched. He must’ve known the hunters were after something. Something he possessed…”

Of course.

Gray opened his eyes and stood. He drew Elizabeth up, too. Her eyes studied the room, but not for ghosts this time. Gray saw the understanding in the pinch of her brows. She donned her eyeglasses.

“My father might have hidden here what his murderers were looking for.”

Gray headed to where Kowalski waited beside the conical-shaped stone. “Your father seemed particularly interested in the temple’s omphalos.”

Elizabeth followed with a frown. “How could you possibly know that?”

Gray briefly explained about the radiation exposure and lifted the Gamma-Scout. “Your father’s trail led here, and for me to get such a strong reading from it, he must have spent some time near the artifact.”

Elizabeth had paled a bit upon hearing of her father’s affliction. Still, she waved to Kowalski. “There’s an emergency flashlight plugged into that wall over there.”

He nodded and fetched it.

She approached the stone. “While it looks solid, it’s actually hollow inside. No more than an upended bowl of carved granite.” She pointed to the hole at the top.

Gray understood. Her father could have easily dropped something inside it. He accepted the flashlight from Kowalski, leaned over the stone, and pointed the beam down into the heart of it. It was indeed hollow. At the bottom, the slats of the pallet that supported the stone were illuminated. He shifted the beam around and spotted something off to one side. It looked like a polished stone, roughly the size of a cantaloupe.

“Can’t tell what it is,” he mumbled and straightened. “We need to lift the stone.”

“It’s heavy,” Elizabeth explained. “Took six men to uncrate it. But there’s a crowbar among the tools in back. We should be able to tilt it up. But we’ll have to be careful.”

“I’ll go get it,” Kowalski said.

As he stepped away, the telephone on Elizabeth’s desk rang. She crossed toward it and checked the caller ID on the handset. “It’s security.” She checked her wristwatch, then glanced to Gray. “It’s already after closing hours. They must be checking on how long I’ll be working down here.”

“Tell them at least another hour.”

She nodded and picked up the phone. She confirmed who she was, then listened. Her eyes widened. “I understand. We’ll be right up.” She hung up the phone and turned to Gray. “Someone called in a bomb threat. Here at the museum. They’re evacuating the building.”

Gray remained silent. He knew such a threat, especially now, was no coincidence. He read the same understanding in the woman’s eyes. “Someone knows,” he said slowly. “After today’s shooting on the Mall, no one will dismiss a bomb threat. It’s the perfect cover to run a covert sweep of the building.”

He turned to study the omphalos.

Time was running out for delicacy.

Kowalski must have understood this, too. He returned from the back of the storage room. “I heard,” he said. Instead of the padded crowbar, he hefted a large sledgehammer on his shoulder. “Get back.”

“No!” Elizabeth warned.

But Kowalski clearly wasn’t taking no for an answer. He closed the distance in one stride, raised the hammer over his head, and swung it down.

Elizabeth gasped in fear for the centuries-old artifact.

But instead of hitting the ancient stone, the sledgehammer slammed into the slats of the pallet that supported the omphalos. Wood splintered and broke. Kowalski lifted the hammer again and cracked more slats on the same side.

With half its weight now unsupported, the great stone tilted toward the crushed side of the pallet—then slowly toppled over, upending itself. More slats were pulverized under its weight, but it seemed undamaged from its slow roll.

Kowalski shouldered the hammer.

Elizabeth stared at the man, her expression wavering between horror and awe.

Gray hurried to the pallet and dropped to a knee. The object hidden under the omphalos now rested in plain view. It was not a polished stone. Gray lifted his Gamma-Scout reader toward it. It read hot, but no worse than the binoculars they’d found earlier.

Satisfied, Gray retrieved it and stood.

Elizabeth stumbled back as he straightened.

Kowalski’s eyes tightened. “A skull? Is that what this is all about?”

Gray examined it closer. The skull was small and missing its lower jaw. He turned it over. The remaining teeth displayed prominent fangs in a protuberant muzzle. “Not human,” he said. “From the size and shape of the cranium, I’d say it’s simian. Possibly a chimpanzee.”

Kowalski’s expression soured even further. “Great,” he drawled out. “More monkeys.”

Gray knew the large man had developed a distaste for all things simian following a previous mission. Something to do with baboons…or apes. Gray could never get a straight story from the man.

“But what…what’s that attached to the skull’s side?” Elizabeth pointed out.

Gray knew what she meant. It was hard to miss. Affixed to the temporal bone, just above the opening to the ear canal, rested a curved block of stainless steel.

“I’m not sure,” he answered. “Maybe a hearing aid. Perhaps even one of the new cochlear implants.”

“For a damn monkey?” Kowalski asked.

Gray shrugged. “We’ll have to examine it later.”

“Why did my father bring that here?”

Gray shook his head. “I don’t know. But someone wanted to stop him. And someone still wants it back.”

“What do we do?”

“We find a way out of here. Before anyone knows we recovered it.”

Gray took a moment to search the rest of the pallet, in case the professor had left anything else here. Like a note explaining everything. One could always hope. He pointed his flashlight into the hollow cavity of the upended omphalos.

Nothing.

As he swung the beam away, the light glanced over the inner surface. Something caught his eye there. It looked like a spiraling groove carved into its surface, starting at the lip and corkscrewing up toward the hole. He reached a finger to it and realized it was a single long line of cursive script. Leaning over, he narrowed the flashlight’s beam upon the writing.

image

Elizabeth noted his attention. “Ancient Sanskrit.”

Gray straightened back. “What’s Sanskrit doing on the inside—?”

Kowalski cut him off. “Does it friggin’ matter already?” He pointed a thumb toward the door. “Remember that bomb scare. Shouldn’t we be haulin’ ass out of here?”

Gray straightened. The man had a point. They’d wasted enough time. The sweep of the building was probably already—

A muffled shout echoed from the hallway.

Kowalski rolled his eyes in a plain expression of I told you so.

“What do we do?” Elizabeth asked.

7:37 P.M.

Painter knocked on the half-open door to the pathologist’s office.

“Come in,” Malcom called out. “Jones, do you have the data from—?”

Painter pushed the door wider just as Malcolm swung around in his desk chair. The pathologist still wore a set of blue scrubs. His glasses rested atop his head. He was rubbing at the bridge of his nose when he noted who stood in his doorway.

His eyes widened. “Director…” He made a motion to stand, but Painter waved him to remain seated as he entered.

“Brant alerted me that you had called. I was just heading back to my office from video surveillance.”

“Any footage of the shooter?”

“Not so far. We’re still combing records. But it’s a mountain of videos to sift. And some sources are slow to respond.”

Since 9/11, surveillance of the capital had been heightened. For a full ten miles in all directions around the White House, multiview cameras monitored every square foot of streets, parks, and public spaces. And over 60 percent of interior spaces, too. Several cameras had picked up pieces of Dr. Archibald Polk’s path across the Mall. They confirmed what Gray had assessed with his radiological tracker. But nagging gaps persisted. Though they had footage of Polk collapsing in Gray’s arms, no camera caught even a glimpse of rifle flash or any sign of the shooter.

It was worrisome.

Painter was beginning to suspect that the sniper had known about the cameras and had found a hole in the surveillance net in which to hide. Or worse yet, someone could have tampered with the Mall’s footage and purposefully deleted any evidence of the assassin.

Either way, such collusion suggested that Professor Polk’s murderer might have powerful ties here in Washington. But who and where? If Polk’s history as a Jason had anything to do with the murder, then it opened a Pandora’s box of possibilities. The Jasons had their fingers in top secret projects of every shade from gray to deep black.

Painter knew he would be getting no sleep tonight.

None of them would.

“Any word from Gray?” Malcolm asked, shifting a pile of papers from a chair and offering a seat to Painter.

“He’s searching the natural history museum. Polk’s trail led there.”

“Hopefully he’ll find something, but that was also why I patched a call to you. I may have discovered more bread crumbs to follow.”

Curious, Painter sank into the chair. Malcolm rotated his computer’s flat-screen monitor to a better angle for Painter to view.

“What did you find?” Painter asked.

“Something curious. I don’t know really what to make of it, but it might give us someplace to continue the investigation. Knowing the victim was suffering from radiation poisoning, I sought some clue to the source. Initial examination of Polk’s gastrointestinal tract and liver showed he didn’t ingest anything radiological in nature.”

“So no dinner poisoned with polonium-210 or the like?”

Malcolm nodded. “From the degree of radiodermatitis burns to his skin, I was fairly certain the radiation came from an environmental source. He must have been in some type of hot zone. Microanalysis of his hair showed the exposure was acute in nature. He’d been poisoned less than a week ago.”

“But where—?”

Malcolm held up a hand for patience and used his other to tap at his keyboard and bring up a map of the world on the monitor. “Trace amounts of radioactive debris were caught in the deep alveolar pockets in his lungs. Like coal dust in a miner’s lung. I ran the sample through a mass spectrograph and was able to determine a rough breakdown of the isotope content.”

He pointed to his screen. The left side of the computer monitor began to scroll with data. “Such information is often as unique as a fingerprint. It just took tapping into IAEA database in Vienna.”

Painter noted that the open search window had the organization’s name stenciled at the top: INTERNATIONAL ATOMIC ENERGY AGENCY.

“The agency monitors hot spots around the world: mines, reactors, industrial sources. Despite what some might think, not all radiation is the same. We’re talking about material that is constantly decaying, whose isotope content varies, depending on where it might have been mined and how it was processed. The end result is radiation signatures unique to each use-site.”

“And the debris in the professor’s lungs?”

“I ran a search through the IAEA database and got a hit.”

“You know where Polk was exposed?”

He nodded to the screen as the scrolling stopped and the world map blew up, zooming into one location in central Russia. A name appeared in a highlighted box, a name synonymous with radiological disaster.

CHERNOBYL

What was Archibald Polk doing at Chernobyl? How had he been exposed to such a lethal level of radiation from the dead reactor site? The reactor was due this week to be sealed with a new Sarcophagus, a massive articulated steel dome. Amid all the new construction, had Polk somehow been exposed to a lethal dose of radiation there?

Before Painter could question Malcolm in more depth, his cell phone vibrated on his belt. He unhooked it and checked who was calling. It was his assistant. Frowning, he flipped it open.

“What is it, Brant?”

“Director, I received an alert from Homeland. There’s just been a bomb threat called in to the natural history museum.”

Painter’s fingers tightened on his cell phone.

The natural history museum…where Gray had been headed.

That couldn’t be good.

“Patch me through to Gray’s radio.”

He waited, cell phone at his ear. Malcolm stared over at him.

Had Gray called in the threat? Had someone else?

Either way, something was wrong.

He had confirmation a second later.

Brant came back on the line. “Sir, he’s not responding.”

7:56 P.M.

Elizabeth Polk appraised Gray Pierce as they neared the museum’s loading docks. Studying him askance, she noted the faded bruising on one side of his face. His sunburned complexion hid most of the contusions. The beating must have taken place a month or so ago. It gave the planes of his face a look of hammered copper and brought out the blue of his eyes. It was those same eyes that chilled her when he spotted the half dozen men clearing the museum’s loading dock and turned them back.

“Something’s not right here,” he said.

She caught a glimpse of the warehouse space past his shoulder. Lit by flickering fluorescents, the cavernous space was crowded with tall shelves stacked with cleaning supplies and dry goods for the various museum concession stores. A single forklift rested beside a series of pulleys and counterbalances for bringing in larger pieces of an exhibit. A steel roll-up door stood open to the right. Outlined against the waning daylight, a cadre of men in black riot gear had set up a cordon near the exit. Under the klaxon of the evacuation alarm, they were searching each worker and staff member who sought to exit in that direction.

A narrow-shouldered man in a blue suit oversaw it from a few steps away. He was plainly someone high up the food chain.

Gray forced her back down the hallway. He hefted his shoulder bag higher. It bore the museum logo and carried the strange skull her father had hidden in the museum’s storage room. At the thought of her father, a dull ache in her chest threatened to melt into sobbing tears. She held it back. She would address her loss at a quieter moment.

Down the hall, in the opposite direction of the docks, a shout echoed out the stairwell ahead, a call to search every room. Boots pounded down the stairs.

Gray stopped and turned to her. “Is there another way out of here?”

She nodded. “The service tunnels. Over this way.”

As she led them back again, Gray fixed her with those stormy eyes, questioning her knowledge.

“Some of the staff take their smoking breaks down there.” She glanced to him guiltily. She really needed to quit. Still, the habit had allowed her to bond with a few of the other researchers. A secret smokers’ club. And all it cost was the risk of emphysema and lung cancer. “We’re not supposed to smoke within the museum, of course. Fire danger, but it’s all stone and steam pipes down there.”

She led them to an unmarked door and keyed open the electronic lock with her card. The stairs on the far side were stained cement with a steel railing along one side. It led down in sharp turns.

Before they could enter, a low growl drew all their eyes back to the docks. A low shape slunk into view of the hallway. Thirty yards away. A German shepherd. It was outfitted with a black vest and was tethered to a man still out of view.

Elizabeth froze.

The dog spotted them and lunged forward, straining against his leash.

“Go,” Gray urged and pushed her through the open stairwell door and followed. His beefy partner crowded in behind them. It was hot and close. The museum’s air-conditioning did not extend here. The only light was a caged emergency bulb.

Gray closed the door with the barest click of the lock engaging. The alarm klaxon muffled. He waved them down the tight stairs and squeezed up to join her. “Do you know where the tunnels lead?”

She shook her head. “Not sure. I never went any farther than I had to. It’s a maze down there, branching in every direction. Rumors say even under the White House. But surely there must be a street exit somewhere.”

Behind them, something heavy hit the door above, followed by deep barks. Shouts echoed, chasing them down the stairs.

“Could it be a bomb-sniffing dog?” Elizabeth asked. “Maybe the threat is real.”

Gray’s partner, Kowalski, snorted. “Only around Pierce is a real bomb threat considered a good thing.”

At the bottom of the stairs, they hit a barred gate. Gray cranked the locking bar aside and creaked the gate open. The tunnels stretched in both directions, pitch-black, sweltering, smelling of wet cement and whispering with trickles of water.

“I hope someone brought the flashlight,” Kowalski commented.

Gray swore softly under his breath. He’d left the light back in the storeroom.

Elizabeth fished in her pocket and produced her cigarette lighter. It was an antique silver Dunhill. She flipped it open and rasped a small flame into existence. With practiced skill, she adjusted the flame.

“Nice,” Kowalski said. “I wish I’d brought one of my cigars.”

“Me, too,” Elizabeth mumbled back.

Kowalski did a double take in her direction.

Before he could say anything, light flooded down the stairs behind them. The alarm klaxon rang louder. Their pursuers had gotten through the upper door.

“Hurry.” Gray headed to the right. “Stay close.”

Elizabeth kept to Gray’s shoulder with Kowalski behind her. She held her lighter high. The flickering glow extended only a few yards ahead. Gray trotted down the tunnel. He kept one arm up, his fingertips trailing along the run of pipes overhead. He took the first branch to get them out of direct view of the stairwell exit.

A single low bark echoed to them.

Gray urged their flight into a run.

Elizabeth’s lab coat flapped behind her. Her flame burned through a nest of cobwebs as they raced around another turn.

“Where are we going?” Kowalski asked.

“Away,” Gray answered.

“That’s your big plan? Away?”

A burst of furious barking erupted. Shouts rang out. Their trail had been found.

“Forget what I said,” Kowalski corrected. “Away sounds just fine by me.”

In a tight group, they fled into the maze of tunnels.

Halfway across the city, Yuri sat on a bench under the spread of a cherry tree. It felt good to sit down. His knees ached, and his lower back threatened to spasm. He had dry-swallowed four tablets of Aleve. He had stronger medications back home, but nothing he dared bring into the States. It would be good to return to the Warren.

He stretched a leg and rubbed a knee.

As he rested, the sun was near to setting and cast long shadows across the parkland walkway. Steps away, a low cement wall bordered the path’s far side. Children and parents lined the edge and pointed down into the outdoor habitat beyond the wall. A small piece of China’s forestland had been re-created: a rocky outcropping sectioned into grottoes, ponds, and misty streams. Shrubs decorated its steep slopes, along with weeping willows, cork trees, and several species of bamboo. The habitat’s two occupants, two Giant pandas on loan from China—Mei Xiang and Tian Tian—had captured the delighted attention of the zoo’s last few visitors.

Including Sasha.

The girl stood with her arms folded atop the lip of the stone wall. One shoe swung rhythmically to strike the cement. But it was slowing down.

As he had hoped.

Yuri had brought the girl to the National Zoological Park after her performance with Mapplethorpe. From long experience, he knew the calming effect animals had on his charges. Especially Sasha. Yuri had no need to test the BDNF levels in the girl’s spinal fluid. After such an intense episode, the hormone levels of “brain-derived neurotrophic factors” had surely spiked to dangerous levels. He had not been prepared. Caught off guard by her performance, he knew he had to calm her down quickly. Away from her home environment, she would be especially agitated, vulnerable. There was a risk of lasting neural damage. He had seen it before. It had taken them decades to discover the innate relationship between autistic children’s mental health and the palliative effect of their interaction with animals.

So while Mapplethorpe executed a search of the natural history museum, Yuri had transported Sasha to the city’s famous zoological park. It was as close a facsimile to the Menagerie as he would find here in the foreign city.

Sasha’s kicking slowed even further. She was ramping down. Still, the toe of her patent leather shoes had become badly scuffed. But better her shoes than her mind.

Yuri felt a knot between his shoulder blades ease. He would get her on the next flight back to Russia. Once returned to the Warren, he would schedule her for a complete physical exam: blood chemistries, urinalysis, a full cranial CT scan. He had to be sure there was no damage.

But more important, he needed an answer as to how she had induced an episode on her own. That shouldn’t have happened. The cortical implant maintained a steady-state level of stimulation, tailored to each child’s ability. Sasha’s display back at Mapplethorpe’s office should not have happened unless her implant was remotely triggered to provoke such a response.

So what had happened? Had there been a malfunction in her implant? Had someone else triggered it? Or even more disturbing, was Sasha growing beyond the yoke of their control?

Despite the day’s heat and his relief, he still felt cold.

Something was wrong.

A flurry of noise erupted ahead of him. It came from the crowd lining the panda exhibit. Excited murmurs swelled. A flurry of camera flashes sparkled among the crowd. More people were drawn by the commotion. Yuri heard a named called out and repeated.

“Tai Shan…Tai Shan…”

He sat up straighter with a wince of protest from his back. He recognized the name from the zoo’s brochure. Tai Shan was the panda cub born to Mei Xiang a few summers back. The youngster must have wandered into sight.

The crowd jostled for a better view. More people gathered. Children were lifted to parents’ shoulders. Cameras flashed furiously. Frowning at the tourists’ manic response, Yuri stood up. He had lost sight of Sasha in the crush of the crowd. He knew she didn’t like to be touched.

He stepped across the walkway and pushed into the pack of people. The park would be closing in the next few minutes. It was time to go.

He reached the wall where Sasha had been standing.

She wasn’t there.

With his heart thudding, he searched the stretch of walls to either side. No sign of her ebony hair and red ribbons. He stumbled outward again, shouldering and pawing his way through the crowd. Grunted protests met his rude passage. A camera tumbled from someone’s hands and cracked against the pavement.

Someone grabbed his shoulder. He was yanked around.

“Mister, you’d better have a goddamn good reason—”

Yuri shook free. His eyes, bright with true panic, met the larger man. “My…my granddaughter. I’ve lost my granddaughter.”

Anger melted to concern.

With mostly parents in attendance, word spread quickly. It was every mother and father’s worst fear. Questions peppered him. What does she look like? What was she wearing? Others offered words of support, promising that she’d be found.

Yuri barely heard them, deafened by his own pounding heart. He should have never left her side, never sat down.

The crowd thinned around him, opening views in all directions.

Yuri turned a full circle. He searched, but he knew the truth.

Sasha was gone.