The bucket of water he thought he was standing in was in fact a cavern full of rising river water. His vision now cleared, Dirk could see through the murky light that Summer was spread-eagled and handcuffed to two large barge anchors. Large weights rather than actual anchors, they were nothing more than a three-foot-square block of concrete. The white blocks were slickened with a decade's coating of pale green algae, with a rusty iron mooring ring protruding from the top. Dirk saw that there were nearly a dozen of the weights aligned in a row across the floor of the cavern. He and Summer stood adjacent to each other, their arms stretched wide with each wrist handcuffed to adjoining blocks.
Dirk's eyes wandered about the dim cavern. In the fading dusk light that filtered through the mouth of the cave, he could see the distinct line on the wall that he was looking for. It was the high-water mark, which he noted uncomfortably ran two feet above their heads.
“Death by slow drowning,” he said.
“Our Fu Manchu friend, Tongju, was most insistent,” Summer replied grimly. “He even prevented one of the guards from shooting you so that we could wallow down here together.”
“I must remember to send him a thank-you card.” Dirk looked down and saw that the water was now sloshing around his rib cage.
“Water's rising pretty fast.”
“We're near the mouth of the Han River, so there's plenty of tidal surge at work.” Summer gazed fearfully at her brother. “I'd estimate that the water level has risen over a foot in the last hour.”
Seeing the despair in his sister's eyes, Dirk's mind engaged in high gear to determine a means of escape. “We have another hour and a half, tops,” he calculated.
“I just remembered something,” Summer said, crinkling her brow. “I've got a small nail file in my side pocket. Might be like trying to kill a pterodactyl with a flyswatter, but it might help.” “Sure, toss it over,” Dirk replied.
“This one mooring ring looks pretty mangy,” she said, tugging at her left wrist. “If I could just get one hand free.”
“Maybe I can help.” Dirk slid his legs toward Summer, leaning his torso at an angle along the concrete blocks for support. Raising one leg, he slid his foot along until the sole of his shoe met up with the face of the protruding iron. Applying as much pressure as he could, he pressed his weight hard against the top of the metal ring.
Nothing happened.
Shifting his foot so that his heel was against the ring, he pushed once more. This time, the ring bent a fraction toward Summer. Jamming his weight repeatedly against the stanchion, he gradually forced the ring to bend over nearly ninety degrees.
“Okay, I'll need your help in pushing it back upright,” he said. “Let's try it on the count of three.”
Slipping his foot to the backside of the ring, he counted to three, then pulled his leg toward him. Summer pushed with her manacled hand and they gradually shoved the ring back to its original vertical position.
“Well, that was fun,” Dirk said while resting his leg. “Let's try it again.”
For twenty minutes, they toggled the ring back and forth, the movement gradually becoming easier as the tensile strength of the old iron weakened. With a last strong kick by Dirk, the ring finally snapped off its concrete base, freeing Summer's left arm. She immediately twisted her hand around and dug into the small side pocket of her silk jacket and produced the porcelain-handled nail file.
“I've got the file. Should I try on the handcuff itself or the mooring ring?” she asked.
“Go for the ring. Even though it's thicker, it will be much softer to cut through than the hardened stainless steel handcuffs.”
Using the small file like a hacksaw, Summer began grinding away at the base of the mooring ring. Working the file with any degree of accuracy beneath the murky river water and fading cavern light would have been a Herculean task for most, but Summer's extensive diving experience gave her a leg up. Years of exploring and excavating historic shipwrecks in foul visibility had heightened her sense of touch to the extent that she could nearly tell more about a wreck from her hands than by her eyes.
With some measure of hope, she felt the file cut rapidly through the outer layer of the rusty ring. Her confidence waned when the blade met up with the hardened inner core of the iron ring and progress slowed to a snail's pace. The rising water was now level with her chest and the pending urgency unleashed a surge of adrenaline. Summer worked the blade back and forth as fast as she could muster underwater, gaining ground millimeter by millimeter. Taking quick breaks from sawing, she placed her hands on the iron ring and pushed and pulled it to weaken the metal. Alternating sawing and prodding with an intermittent gulp or two of river water, she at last broke through the ring and freed herself.
“Got it,” she exclaimed with victory.
“Mind if I borrow that file?” Dirk asked calmly, but Summer had already kicked and swum her way over and begun cutting into the ring grasping his right hand. As she worked the file, she mentally noted that it had taken her roughly thirty minutes to cut through the first ring and that the water level was now nearly to their shoulders. The water was rising faster than she anticipated and would be well above Dirk's head in less than an hour. Despite aching fingers and limbs, she rubbed the file ferociously against the iron.
Dirk, waiting patiently as Summer filed away, began whistling the old 1880s tune “While Strolling Through the Park One Day.”
“That's not helping,” Summer gasped, then smiled to herself at the silly tune. “Now I won't be able to get that ridiculous song out of my head.”
Sure enough, he quit whistling, but the tune kept replaying over and over in her head. She was surprised to find it became a good sawing mantra that provided a rhythm to her hand movements.
While strolling through the park one day,... With each syllable, she applied a cutting stroke to the iron, creating an efficient sawing cadence. in the merry merry month of May.
I was taken by surprise by a pair of roguish eyes.
In a moment my poor heart was stole away.
The water level had now crept up over her chin and she found herself taking in gasps of air, then submerging briefly to keep the file clawing in one spot. Dirk was beginning to strain to keep his face out of the water while applying alternating tugs and shoves on the ring as Summer sawed tirelessly on. A muffled metallic ting finally echoed beneath them as the ring broke loose under their combined pressure.
“Three down, one to go,” Summer gasped, taking in a lungful of air after being submerged for several seconds.
“Let me give you a breather,” Dirk said, grabbing the file from Summer with his free hand. The release of his right hand gave him a few extra inches of breathing room, but it was not enough to file the last mooring ring without submerging. Taking a deep breath, he ducked under the surface and began filing rapidly on the ring that held down his left wrist. After thirty seconds, he bobbed to the surface, sucked in some fresh air, and plunged back under. Summer stretched her cramped fingers, then swam to Dirk's left side and waited for him to surface. Like a pair of tag team wrestlers trying to floor Hulk Hogan, they passed the file back and forth and ducked underwater, attacking the iron ring with muscle and fervor.
As the minutes wore on, the water level in the cavern crept higher and higher. Each time Dirk surfaced for a gasp of air, he felt himself stretching farther and farther to raise his mouth and nose above water. The handcuff shackle on his left wrist dug into his flesh as he instinctively yanked hard to escape the clutch of the massive barge weight.
“Save your strength for getting out of here,” he told his sister as the inevitable truth drew closer that they were running out of time. Summer said nothing as she grabbed the file out of his hand and plunged back beneath the surface. Dirk half-floated with his head tilted back, his face just barely out of the water, drawing a few deep breaths. He could feel the water wash over his face in ripples and stretched for one last deep breath before pulling himself under. Grasping Summer's wrist, he pulled the file out of her hand and began a last furious rush at cutting through the iron. Feeling the gouge with his thumb, he could tell that they had cut only a third of the way through. There was just too far to go.
The seconds felt like hours as Dirk made a final effort to break free. He could feel his heart beating like a bass drum as it struggled to pump oxygen into his depleted blood. In the murkiness, he could feel that Summer was no longer by his side. Perhaps she had finally taken his advice and sought escape. Or perhaps she just couldn't bear to be with him during his final gasp of life.
He paused from filing for a second to try pushing his weight against the ring. He could generate little
