A momentary flash of terror struck, telling her she was going to drown.

“Relax. Relax. Relax,” a voice repeated in her head.

With her heart pounding, she forced herself to hold still and drift with the current for a few seconds. It calmed her nerves, and she began scooping the water with her bound hands in a doggie paddle that would carry her to the surface. But in the inky black water, she no longer knew which way was up.

The answer came quickly when her shoulder grazed the corroded underside of the barge. She pushed herself away and drifted clear, holding on a few more seconds, before ascending slowly into the cool night air.

The current was swift, and she found herself moving away from the barge and towboat. She looked back and saw Pablo running along the dock, scanning the water. Spotting Ann’s head bobbing in the river, he pulled his Glock out of its holster.

Ann instantly took a deep breath and rolled beneath the surface. She couldn’t tell whether he fired at her, but there was no sense in giving him a target.

She glided more easily beneath the surface this time, holding her breath for nearly a minute, while kicking and paddling with the current. When she surfaced again, she was more than a hundred yards from the barge—all but invisible in the darkness to anyone on the dock. Still, Pablo had disappeared from her view.

She turned her attention downriver, searching for a place to go ashore and find help. But the dock was on the outskirts of town, and the nearside riverbank was dark and empty. A sprinkling of lights glistened a short distance ahead on the opposite bank, marking the small town of Metropolis, Illinois.

Feeling the lure of safety, Ann began kicking and paddling toward the lights. She struggled for a few minutes, fighting the downstream current. Then she realized her efforts to reach the town would be in vain. The river was almost a mile across, and the current would sweep her well past its lights before she could reach the other side.

The awkwardness of swimming with bound wrists increased her fatigue, so she rolled over and rested by floating on her back. Looking into the sky, she noticed a pair of red flashing lights in the distance. Turning herself over, she studied them as they flashed—airplane warning lights. In their brief stabs of illumination, she could see they were affixed to a pair of tall concrete smokestacks. They could only be part of a riverfront power plant.

As she floated past the lights of Metropolis, she worked her way back toward the near shore. The riverbank went black for a mile, and Ann began feeling cold and alone. But she continued to track the blinking red lights and eventually drew closer. A haze of light at the base of the stacks crystallized into a profusion of bright lights that engulfed the power plant. The lights were set well back from shore, but as Ann passed a shrub-lined bank she spotted a thin inlet that had been cut from the river to the plant.

When she approached the mouth of the inlet, she began kicking hard. The Ohio’s current tried to drag her past, but she broke free of its grasp and entered the inlet’s calm waters. The cut ran about a third of a mile toward the plant, where the water supplied the coal-fired steam boilers.

Exhausted from her final struggle against the current, Ann made for the nearest bank. She rested in the mud for several minutes, then pulled herself off the bank and climbed up a berm that had been graded on top for vehicle access.

She shivered in her wet clothes as she hiked toward the power plant, smelling the rich odor of burnt coal. As she drew closer, she counted several vehicles parked around the plant. Thankfully, a sizable night shift was on-site. Headlights flickered to her left, and she saw a white pickup truck move slowly from the parking lot, an orange light flashing atop its cab. Ann quickened her pace and began waving her bound arms as soon as she thought the driver might spot her.

The truck sped up and turned onto the berm. It bounced along the narrow track and stopped in front of Ann with a swirl of dust. She raised her cuffed hands and approached the open driver’s window. “Can you please help me?”

Her voice quivered when she saw Pablo stick his head out the window, brandishing a portable GPS unit keyed to her handcuffs and the Glock pistol.

“No, my love,” he said in a cruel voice. “It is you who can help me.”

PART III

PANAMA RUN

43

SUMMER PITT LOOKED UP FROM A CLIPBOARD IN HER lap and gazed out the submersible’s acrylic dome window. With nothing to see but blackness, it felt like being locked in a closet. “How about some exterior illumination?” she asked.

Her twin brother, seated at the pilot’s controls, flipped on a row of toggle switches. A battery of bright LED lights popped on, putting a glow into the coal-black water. But there was still little to see, aside from particles in the water rushing past the acrylic. At least it gave Summer a visual sense of their rate of descent.

“Still afraid of the dark?” her brother asked.

While Summer had inherited the pearlescent skin and red hair of her mother, Dirk Pitt, Jr., resembled his father. He had the same tall, lean build, the same dark hair, even the same easy smile.

“Down here, what you can’t see can hurt you,” she said. She checked the depth indicator on an overhead monitor. “Coming up on the bottom in fifty meters.”

Dirk adjusted the ballast tanks to slow their descent, easing the vessel to neutral buoyancy when the seafloor appeared to rise up beneath them. At their depth of three hundred feet, the seafloor was a walnut-colored desolation, populated only by a few small fish and crustaceans.

“The fault line should be on a bearing of zero-six-five degrees,” Summer said.

Dirk engaged the submersible’s electronic thrusters and propelled them on the northeast heading. Through the yoke, he could feel a strong bottom current sideswiping them. “The Agulhas Current is humming today. Like to take us to Australia.”

The powerful Agulhas flowed down the east coast of Africa. Near the southern tip of Madagascar, where Dirk and Summer were diving, it converged with the East Madagascar Current and streams from the Indian Ocean to create an unpredictable swirl.

“We likely drifted a considerable amount during our descent,” Summer noted, “but if we hold to the heading, we’ll still cross the fault line.” She pressed her nose against the bubble and scanned the lightly undulating seabed passing beneath them. After several minutes, she spotted a slight, but distinct, ridge. “That’s our uplift.”