“There, in the water ... two objects!” he cried, pointing an arm off the port bow.

Tongju nodded at the words. This time they are finished, he thought with ruthless satisfaction.

After their fourth submerged interval, Dirk and Summer reunited on the surface and took a moment to rest. Fighting their way across the current, they had distanced themselves from the skiff by almost four hundred meters.

“We can swim on the surface for the time being,” Dirk said between deep breaths. “Give us a chance to see what our friends are up to.”

Summer followed her brother's lead and rolled onto her back, kicking into a backstroke that allowed them to watch the distant catamaran as they moved farther across the river. Kang's boat was idling near the skiff, its spotlights circling the immediate area around them. Shouting erupted from the catamaran and the boat suddenly raced downriver a short distance. Gunfire exploded again for a moment, then ceased as the boat stopped in the water.

Tongju had raced the catamaran toward the two objects spotted floating on the water and watched with disdain as his gunmen blasted away at the empty life vests that Dirk had tossed into the water. The boat idled around the life jackets for several minutes, waiting for the two escapees to surface in case they were hiding submerged nearby, before resuming the search. Dirk and Summer struggled toward midriver as they watched the catamaran begin making a wide-circle search around the skiff and life jackets. With each loop around the still-drifting skiff, the catamaran's pilot enlarged the circle in an ever-expanding spiral.

“Won't be too many more minutes before they work their way up and out our direction,” Summer lamented.

Dirk scanned the watery horizon. They had worked their way about a mile into the river but were still barely a quarter of the way across the vast waterway. They could turn back and try for the nearest shoreline, but that would entail crossing the path of the advancing catamaran. Or they could continue with their original plan of traversing the river toward the lights on the opposite shore. But fatigue was beginning to creep up on them, hastened by their long immersion in the cool water. Another three-mile swim would be a tall order, made more difficult by the repeated submergings they would have to perform to avoid Kang's boat. Whether they could in fact survive the game of cat and mouse with Tongju and his gunmen would be uncertain at best.

But there was a third option. The small vessel with the colored lights that they had earlier noticed upriver was approaching on a nearby path about a half mile away. In the darkness, Dirk had trouble identifying the boat, but it appeared to be a wooden sailing vessel of some kind. A small red sail, revealed under the white mast light to be square shaped in dimension, was raised near the bow, but the boat didn't appear to be moving much faster than the current.

Dirk gauged the path of the boat and swam another hundred yards toward the center of the river, then stopped. Summer swam past before realizing her brother had halted.

“What gives? We need to keep going,” she whispered after swimming back to him.

Dirk nodded downriver toward the catamaran. The sleek vessel had arced well out into the river as it circled downstream. He mentally calculated the trajectory of the yacht if it held its current circular course.

“They'll be within sight of us on the next upriver pass,” he said quietly.

Summer could see he was right. The bright beams of the searchlights would shine upon their position on the next loop. They would have to remain submerged for several minutes to guarantee their concealment.

Dirk took a quick glance upriver. “Sister, I think it's time for Plan B.”

“Plan B?” she asked.

“Yes, Plan B. Stick out your thumb and start hitchhiking.”

The large wooden sailboat creaked lazily down the river, its foremast sail and a small auxiliary motor pushing it along just 3 knots faster than the current. As the vessel crept closer, Dirk could see that it was a three-masted Chinese junk of about twenty-five meters in length. Unlike most dilapidated sailing boats in this part of the world, the junk appeared to be maintained in pristine condition. A string of multicolored Chinese lanterns hung gaily from bow to stern, lending a party like atmosphere to the boat. Constructed entirely of rich teak-wood, the highly varnished surfaces seemed to glisten under the swaying overhead lamps. Somewhere belowdecks, a pair of stereo speakers blared out an orchestral tune, which Dirk recognized as a Gershwin melody. Yet despite the festive atmosphere, there was not a soul to be seen on deck.

“Ahoy! We're in the water. Can you help?”

Dirk's muted shout went unanswered as the junk approached. He repeated the call, careful not to draw attention from the catamaran, which had completed a downstream turn and was now headed upriver. Swimming closer to the moving junk, Dirk thought he detected a shadowy movement on the stern, but, again, there was no response to his call for help. He tried a third time, failing to notice as he spoke that the muffled drone of the junk's motor audibly raised a note.

The junk's golden teak hull began gliding past Dirk and Summer, an ornately carved dragon on the prow eyeing them maliciously in the water less than ten feet from the starboard beam. Like a phantom in the night, the junk slipped by strangely impervious to the voices calling from the water. As the stern and rudderpost floated past, Dirk abandoned hope of rescue from the junk and angrily wondered whether the pilot was asleep, drunk, or both.

Peering toward the slowly approaching catamaran, he was startled by a sudden splash in the water near his head. It was an orange plastic float tied to a coil of rope, trailing back to the stern of the junk.

“Grab hold and hang on tight,” he instructed his sister, making sure Summer had a strong grip on the line before grasping it himself. As the line quickly drew taut, the force of the junk sailing faster than the river momentarily jerked them underwater. With a face full of water, they were dragged along the river's surface like a fallen water-skier who forgot to let go of the towline. Dirk slowly began pulling himself up the line hand over hand as his legs flailed out behind him. Reaching the high, blunt stern of the junk, he shimmied up the rope almost vertically until reaching the stern railing. A pair of hands emerged from the darkness, grabbing about his lapels and forcefully yanking him over the railing and onto the deck.

“Thanks,” Dirk muttered, paying little heed to a tall figure in the shadows. “My sister is still on the line,” he gasped, standing and grabbing the line at the stern rail and pulling at it. The tall man stepped up behind him and clasped the line, throwing his weight into it with Dirk. Together, they hoisted Summer up the railing like a gigged flounder until she flopped over the railing and onto the deck in a soggy heap. A high-pitched bark erupted from across the deck and, in an instant, a small black-and-tan dachshund raced over to Summer and began licking her face.

“Dark night for a swim, don't you think?” the stranger said in English.

“You're American,” Dirk stated with surprise.

“Ever since being born in the Land of Lincoln,” came the reply.

Dirk studied the man beside him for the first time. He stood six-foot-three, nearly matching his own height, though he carried a good twenty pounds more heft. A wave of unruly white hair and a matching goatee indicated that he was at least forty years his senior. The man's blue-green eyes, which seemed to twinkle with mischief under the hanging lights, touched a nerve with him. He felt as if he was looking at an older version of his own father, he finally decided.

“We're in great danger,” Summer injected, rising to her feet. She scooped up the small dog as she stood and rubbed its ears briskly, which produced a sharp wag of its tail. “Our research vessel was sunk by these murderers and they mean to kill us,” she said, nodding downriver toward the catamaran that was circling slowly in their direction.