Jack gave the chimney a wide berth. Still, as his sub slid past he watched the external temperature readings climb quickly. The vents themselves could reach temperatures over seven hundred degrees Fahrenheit, hot enough, he knew, to parboil him in his little sub.

“Jack?” The worried voice of the team’s medical doctor again whispered in his ear. She must have noticed the temperature changes.

“Just a smoker. Nothing to worry about,” he answered.

Using the foot pedals, he eased the minisub past the chimney stack and continued on a gentle dive, following the trench floor. Though life down here fascinated him, Jack had a more important objective than just admiring the view.

For the past year, he and his team aboard the Deep Fathom had been hunting for the wreck of the Kochi Maru, a Japanese freighter lost during WWII. Their research into its manifest suggested the ship bore a large shipment of gold bullion, spoils of war. From studying navigation and weather maps, Jack had narrowed the search to ten square nautical miles of the Central Pacific mountain range. It had been a long shot, a gamble that after a year had not looked like it was going to pay off — until yesterday, when their sonar had picked up a suspicious shadow on the ocean’s bottom.

Jack was chasing that shadow now. He glanced at the sub’s computer. It fed him sonar data from his boat far overhead. Whatever had cast that shadow was about a hundred yards from his current position. He flipped on his own side-scanning sonar to monitor the bed’s terrain as he moved closer.

A ridge of rock appeared out of the gloom. He worked the pedals and swerved in a wide arc around the obstruction. The abundant sea life began to dissipate, the oasis vanishing behind him. Ahead, the seabed floor became a stretch of empty silt. His thrusters wafted up plumes as he passed. Like driving down a dusty back road.

Jack circled the spur of rock. Ahead, another ridge appeared, a foothill in the Central Pacific range. It blocked his progress. He pulled the sub to a hovering halt and released a bit of ballast, meaning to climb over the ridge. As he began to drift upward, a slight current caught his sub, dragging him forward. Jack fought the current with his thrusters, stabilizing his craft. What the hell? He nudged the craft forward, skirting toward the top of the ridge.

“Jack,” Lisa whispered in his ear again, “are you passing another smoker chimney? I’m reading warmer temperatures.”

“No, but I’m not sure what — Son of a bitch!” His sub had crested the ridge. He saw what lay on the far side.

“What is it, Jack?” Fear quavered in Lisa’s voice. “Are you okay?”

Beyond the ridge a new valley opened up, but this was no oasis of life. Ahead was a hellish landscape. Glowing cracks crisscrossed the sea floor. Molten rock flowed forth, shadowy crimson in the gloom as it quickly cooled. Tiny bubbles obscured the view. Jack fought the thermal current. The flow kept trying to roll him forward. From the hydrophone’s speakers a steady roar arose.

“My God…”

“Jack, what did you find? The temp readings are climbing rapidly.”

He needed no instruments to tell him that. The interior of the sub grew warmer with each breath. “It’s a new vent opening.”

A second voice came on the horn. It was Charlie, the geologist. “Careful, Jack, I’m still picking up weak surges from down there. It’s far from stable.”

“I’m not leaving yet.”

“You shouldn’t risk—”

Jack interrupted, “I’ve found the Kochi Maru.”

“What?”

“The ship is here…but I don’t know for how long.” As the sub hovered atop the ridge, Jack stared out the acrylic dome. On the far side of the hellish valley lay the wreck of a long trawler, its hull cracked into two sections. In the dull glow, the shattered windows of the pilothouse stared back at him. On the bow were printed black Japanese letters. He was well-familiar with the name: KOCHI MARU. Spring Wind.

But the name no longer fit the wreck.

Around the ship, molten rock welled and flowed, forming ribbons and pools of magma, steaming as it quickly cooled in the frigid depths. The forward half of the ship lay directly over one of the vents. Jack watched as the steel ship began to sink, melting into the magma.

“It’s smack dab in the middle of hell,” Jack reported. “I’m gonna get a closer look.”

“Jack…” It was Lisa again, her voice hard with a pending command. But she hesitated. She knew him too well. A long sigh followed. “Just keep a watch on the external temp readings. Titanium isn’t impervious to extreme temperatures. Especially the seals—”

“I understand. No unnecessary risks.” Jack pushed both foot pedals. The sub shot off the ridge, climbing higher at the same time. As he glided toward the wreck, he watched the temperature continue to rise.

Seventy-five…one hundred…110…

Sweat pebbled Jack’s forehead and his hands grew slick. If one of the sub’s seals should weaken and break, the crushing weight at this depth would kill him in less than a second.

He climbed higher, until the temperature dropped below a hundred again. Satisfied he was safe, he goosed the sub, passing over the valley. Soon he hovered over the wreck itself. Tilting the sub on its side, he circled the broken ship.

Leaning a bit, Jack stared down at the wreck. From this vantage point, he could see the broken stern resting a full fifty yards from the bow. The hollow cavity of the rear hold was turned away from the vents. Across the silt, lit by the fiery glow of the nearby vents, lay a scattering of crates, half buried, wood long turned to black from the decades it was submerged.

“How’s it looking, Jack?” Lisa asked.

Narrowing his eyes, he studied the spilled contents of the wreck. “Ain’t pretty, that’s for damn sure.”

After a studied pause, Lisa came back on. “Well…?”

“I don’t know. I mortgaged the ship and the old family ranch to finance this trip. To come up empty-handed—”

“I know, but all the gold in the world’s not worth your life.”

He could not argue with that. Still, he loved the old homestead: the rolling green hills, the whitewashed fences. He had inherited the hundred-acre ranch after his father died of pancreatic cancer. Jack had been only twenty-one. The debts had forced him out of the University of Tennessee and into the Armed Services. Though he could have sold the place and finished school, he had refused. The land had been in the family for five generations — but truthfully it was more personal than that. By the time his father had passed away, his mother was already long in her grave, succumbing to complications from a simple appendectomy when he was a boy, leaving no other children. Jack hardly remembered her, just pictures on the wall and a handful of memories tied to the place. No matter what, he refused to lose even these slim memories to the bank.

Lisa interrupted his reverie. “I could always try extending my NSF grant and scrounge up more funds.” It was her government money that had allowed them to lease the Nautilus and test its patented Bio-Sensor system.

“It won’t be enough,” Jack grumbled. Secretly he had hoped to garner sufficient funds from a successful haul here to clear his debts, with a stash left over to finance a lifetime of treasure hunting.

That is, if the Kochi Maru’s manifests were accurate….

Jack ignored caution and obeyed his heart. He shoved both foot pedals. The submersible dove in a tight spiral down toward the broken stern of the Kochi Maru. What would it hurt to take a fast peek?

The temperature gauge began to climb again: 110…120…130…

He stopped looking.

“Jack…the readings…”

“I know. I’m just going to take a closer look at the ship. No risks.”

“At least replace your Bio-Sensor clip so I can monitor you.”