For twenty minutes nothing changed, and then, as if a light had been switched off, the glow vanished entirely. In the next instant, a chop returned to the ocean’s surface, and the smoke began drifting aft as a wind swept across the ship from out of the north. To the west, where the phenomenon had first appeared, lay nothing but darkened skies sprinkled with a scattering of stars. A night at sea had never appeared more normal.

Urquhart huddled with his remaining officers in the back corner of the pilothouse while they detoured west to see if another ship had been at the epicenter of the otherworldly aura. He gave them orders to have Conner McTaggert sewn into his blankets and for his body to be slipped over the side. They were close enough to making Philadelphia that the engineer’s death could be concealed, and his absence, once they left port, could be explained away as him jumping ship.

They found no evidence of any other vessels in the area, and after an hour-long search Urquhart determined that they had wasted enough time. Still, when they reached Phili, he planned to report the incident in case any other ships had suffered from the strange effect. McTaggert’s death would remain a secret for the simple reason that it would delay them for days, or weeks, as statements were taken and investigations launched.

He wasn’t pleased at the disrespect he was showing his friend, but he felt certain that the unmarried McTaggert would understand.

As he’d promised himself, Charles Urquhart did report the incident to the Coast Guard, and his story was picked up by a local paper. No mention was made of the dead engineer. Nor was there any mention of another ship that had experienced the phenomenon. The Mohican managed to limp back to Philadelphia. But another ship, and its five-man crew, had vanished without a trace.

It was the landscape of another world. Towering black crags rose above vast glittering snowfields. Winds that could shriek out of the stillness blasted the air at over seventy miles per hour. A sky that was sometimes so clear it was as though the earth had no atmosphere. And sometimes clouds would cling to the land with such utter tenacity that the sun remained hidden for weeks on end.

It was a landscape not meant for human habitation. Even the hardiest natives avoided this location and lived far down the coast in tiny villages that they could pack up in pursuit of caribou herds.

All this made it the ideal spot for the Soviets to build a supermax prison in the early 1970s, a prison meant for the most dangerous criminals — the political kind. God and a few bureaucrats alone knew how many souls had perished behind the bleak concrete walls. The prison was built to hold five hundred men, and until it was shuttered in the years following the collapse of the Soviet Union, a steady stream had been trucked in on the isolated access road to replace those who had succumbed to the cold and deprivation and brutality.

There were no graves to mark men’s remains, only a pit of ashes from their cremated bodies — a very large pit — that now lay buried in the permafrost a short distance from the main gate.

For twenty years the facility remained abandoned and left to the vagaries of the weather, though Siberia’s notorious winters could do little to erode the cement-and-steel structure. When people returned to reopen the prison, they found that it was exactly as it had been when it closed, immutable, impenetrable, and, most of all, inescapable.

A lone truck painted in matte green military livery wound its way toward the penitentiary that sat in the shadow of a singular mountain that looked as if it had been cleaved in two, with a sheer vertical face to the north, the Arctic Ocean some thirty miles away. The road was heavily rutted because in the summer parts of it turned into a swampy morass, and if crews didn’t smooth it before the frosts came, it retained a corrugated texture. Blowing snow drifted across it in places where the plows hadn’t opened the pathway far enough.

The sun hung low on the horizon, cold and distant. In a few weeks’ time it would make its final plunge over the rim of the world and not reappear until the next spring. The temperature hovered just a tick above zero Fahrenheit.

The truck approached the slab-sided prison fortress, with its four guard towers rising like minarets. An outer ring of chain-link fence with razor wire circled the entire two-square-acre building. A sentry box sat just inside of the fence to the right of the access road. Between the box and the prison sat a humpbacked heavy-transport helicopter painted arctic white.

Only when the truck had come to a stop did a guard, bundled against the cold, waddle out of his little heated hut. He knew the truck was expected, but peering through the windshield he didn’t recognize the drivers. He kept his AK-74, the updated version of Mikhail Kalashnikov’s venerable AK-47, within easy reach on the strap dangling from his shoulder.

He motioned for the driver to step out of the cab.

With a resigned shrug, the driver opened his door, and his boots crunched into the compacted snow.

“Where’s Dmitri?” the guard asked.

“Who’s Dmitri?” the driver replied.

It had been a test. The regular drivers of the prison transfer truck were named Vasily and Anton.

The driver continued, “If you mean Anton or Sasha”—Vasily’s nickname—“Anton’s wife had her baby, another boy, and Sash is down with pneumonia.”

The guard nodded and felt less ill at ease at having strangers coming out to the secret prison. They obviously belonged to the same squad as the regular crew. “Show me your papers, and have your co-driver come out with his.”

A few moments later, the guard was satisfied with the men’s bona fides. He swung his assault rifle farther onto his back and keyed open the gate. He pushed the gate outward, its mass of concertina wire jangling with dark resonance.

Exhaust burst into a white cloud as the driver accelerated through the gate and under an open portcullis that gave access to the central courtyard around which the four blocks of the prison had been built. Ahead were steps leading to the entrance, itself a door more befitting a bank vault than a building. Two guards in white camouflage were waiting by the door. The truck turned in a tight arc, then began backing slowly toward the men. When one of them judged it close enough, he held up a hand. The driver hit the brakes. It was against protocol for him to leave the engine idling, on the off chance a prisoner might manage to steal the truck, so he killed the ignition and pocketed the keys.

It was a separate key on a different fob that opened the rear doors. The two guards had their AKs at their shoulders when the doors creaked open.

Inside was a single prisoner, shackled at the wrists and ankles and chained to the floor. He wore prison blues, with a thinly padded jacket to ward off a little of the arctic air. At first, it looked as though he had tightly cropped dark hair, but, in fact, his head was perfectly shaved. It was the intricate design of interlacing tattoos covering his skull that made it look like he had hair. The tattoos continued around his throat and disappeared into the V of his prison shirt. He wasn’t necessarily a big man, but there was a feral intensity to his glacial blue eyes that made him seem dangerous.

“Okay, my friend,” the driver said with mocking jocularity, “you’re home.” His tone darkened. “Give us any trouble and you die here and now.”

The prisoner said nothing, but the ferocity of his glare eased like he’d dialed down some personal rheostat of rage. He nodded once, a signal that he would cooperate.