Chapter 12
Yuji knelt at the spring’s source, water warm around his shins, and uncapped the first sample vial. Stroud held the headlamp at an angle that lit the fracture without blinding him—the light caught mineral deposits on the rock, turned them to a stripe of amber and rust against the pale dolomite.
The vial filled. Yuji capped it, labeled the glass with his grease pencil, and reached for the first of the copper tubes.
Six of them waited in his pack, ready to be filled with spring water and crimped shut without an air gap.
They would preserve its dissolved helium and other noble gases for isotope analysis—clues to the water’s age and how deeply it had circulated.
Stroud crouched beside him, one knee in the water. “Your grandfather would have known that from the taste.”
“He would have known it from everything.” Yuji filled the second tube, watched the copper catch the lamplight. “Temperature, mineral content, the way the water moved. He could read a spring the way other people read faces.”
The third tube. The fourth. Each one a data point that would survive the journey to a lab where centrifuges and spectrometers would confirm what Yuji’s instruments already showed: the Bone Spring was real.
“Flow rate’s steady.” Yuji held his hand over the fracture, felt the pulse of water against his palm. “No surge, no variation. This isn’t seasonal—it’s continuous upwelling from the water table.”
He filled the fifth tube, then the sixth. The pack hung heavy now—sample weight he’d feel on the climb out.
“I have enough.” Yuji crimped the last tube shut and settled it into the padded case. “Everything the grant committee needs to see. Thermal signature, mineral profile, flow characteristics. They’ll approve the full study.”
Stroud stood, water streaming from his knees, and pulled Yuji upright.
“We should move.” Stroud checked his watch. “Canyon’ll be getting sun soon.”
Yuji shouldered his pack, the sample tubes clinking against each other. They crossed the chamber toward the slot, boots splashing through the shallow pool that covered the travertine floor.
They pushed through the vertical crack, stone pressing close on both sides. The gallery beyond was different now—wetter. Water sheeted down the walls, pooling on the floor in a way it hadn’t when they’d passed through earlier. Yuji’s boot splashed in an inch of standing water.
“This wasn’t here before.”
“No.” Stroud was already moving, crouched low under the dropped ceiling, his light jerking with each step. “Move. Fast as you can.”
Yuji followed. His pack caught on a low projection; he wrenched free, heard something crack—one of the glass sample vials, maybe, or the pH meter’s housing. No time. The water was ankle-deep now, warm but getting colder as surface runoff mixed in.
They reached the boulder choke. The gap they’d squeezed through on the way in was half-submerged.
“Stroud—”
“I know.” He was already slipping the gear bag from his shoulder and shoving it through the gap ahead of him. “Hold your breath and follow me. Stay on my heels.”
He dropped to his belly and pulled himself into the flooded passage. Yuji watched his boots disappear, heard splashing and grunting ahead, and then Stroud’s voice, muffled by rock and water: “Clear on this side. Come on.”
Yuji sucked air and went in headfirst. Cold water closed over his back, shockingly cold after the warmth of the spring chamber. His hands found rock, found Stroud’s grip on his wrist, and he was hauled through a gap that scraped his shoulders.
On the other side, water streamed down the tumbled boulders in sheets. The path they’d taken was disappearing.
“The canyon’s flooding.” Stroud’s headlamp carved through the spray. “Something upstream—a thunderstorm somewhere in the watershed. We won’t make it out the way we came.”
“Then where?”
“Back to the chamber. It’s the high point.” Stroud grabbed his arm and pulled. “Now.”
They ran back toward the boulder choke. The gap they’d belly-crawled through minutes ago was nearly submerged now—just inches of air above the waterline.
“Deep breath. Don’t stop moving.” Stroud shoved his SAR duffel through ahead of him, sucked air, and disappeared under.
Yuji hesitated but there was no time. He pulled the straps of his pack tight against his chest and followed, lungs full, the cold water closing over his head as he dragged himself through the gap.
His fingers found Stroud’s boot, then open water, then Stroud’s hand hauling him up on the other side.
They pushed through the gallery, water at their thighs now. The slot passage back to the spring chamber was a waterfall, water streaming down through the vertical crack with a roar that drowned speech. Stroud boosted Yuji up into the slot, then hauled himself after, both of them soaked and gasping.
The spring chamber had changed. Water poured in from every crevice, every crack in the walls, churning what had been a still pool. The level had risen two feet since they’d left.
“The ramp.” Stroud’s light found the entrance slope, half-covered by the rising flood. “Highest point. Go.”
They scrambled up the wet rock, boots slipping, hands grabbing for holds. Yuji made it to the top of the ramp—a narrow ledge where the floor angled up against the wall—and pulled Stroud after him.
The water was at their waists.
“It’s still coming.” The roar of the flood filled the chamber, drowning everything but the most basic communication. “Stroud, it’s not stopping.”
“I know.” Stroud pulled the radio from his belt. “SAR, this is Stroud, we’re trapped underground at the seep site, water rising fast, do you copy?”
Static. The signal couldn’t punch through the rock.
Stroud’s headlamp swept the walls—and stopped. A stripe of mineral deposit darker than the surrounding rock. Eight feet above their heads. He found another higher up, then another, their dark bands climbing until his beam caught one just below the scalloped ceiling.
High-water marks. Ancient floods had risen nearly to the ceiling of this chamber.
He tried again. “SAR, this is Stroud, emergency, do you copy?”
Nothing.
The water reached their chests. Yuji’s pack floated behind him, buoyant with trapped air. Cold crept into his legs. His breath came short and fast.
“The lamp—Stroud, the lamp’s going.”
The headlamp flickered once, twice, then died. Total darkness. No stars, no ambient glow. Just the roar of water and the cold climbing his body.
Stroud’s hand found his in the dark, grip crushing.
“Don’t let go.”
“I won’t.”
Stroud’s voice close to his ear, loud enough to carry over the flood. “Hold onto me.”
The water lifted Yuji off the ramp. Stroud’s arm locked around his chest from behind, both of them floating now. The current pulled at them, tried to drag them toward the slot passage, toward the flooded choke and the drowning dark beyond.
Stroud kicked. They moved through water Yuji couldn’t see, couldn’t navigate. His head went under—cold shock, water flooding his sinuses—and then Stroud hauled him up and his face broke through the surface into a pocket of air.
Not much. Inches. The ceiling pressed against his forehead when he lifted his chin.
“Breathe.” Stroud’s mouth at his ear, both of them treading water in the dark, lips pressed to stone and the thin layer of air that remained. “Slow. Don’t panic.”
Yuji breathed. The air tasted of mineral and stale earth. His lungs burned. His legs kicked, keeping him afloat, but the cold was sapping his strength.
“If we die here?—”
“We’re not dying here.” Stroud’s arm tightened across his chest. “The flood’ll peak and drop. Always does. We just have to outlast it.”
The water rose another inch. Yuji tilted his head back, mouth and nose pressed to the ceiling, sucking what air remained. The scallop they’d found was shrinking, the air pocket compressing as the flood filled the chamber.
Hideo had stood in this same chamber fifty years ago. Had he imagined a flash flood turning his secret spring into a trap?
The water touched his lips.
“Stroud—”
“Hold on.” Both of them fighting to keep their mouths above the surface. “Just hold on.”
Yuji’s fingers dug into Stroud’s arm. The cold had stolen the feeling from his legs, his hips, his chest. Only the grip remained.
The water covered his mouth. His nose. Yuji closed his eyes—pointless in the dark, but instinct won—sucked one last breath through the shrinking gap, and then the flood took the air pocket entirely.
Underwater. Completely submerged. The pressure equalized against his eardrums with a dull pop. Just cold darkness and Stroud’s arm clamped across his ribs.
Stroud kicked. The motion traveled through Yuji’s back—bunching of thighs, surge of movement through water he couldn’t see. Swimming along the ceiling, Stroud’s free hand trailing against stone. Searching. Another pocket. Another scallop where air might be trapped.
Yuji’s lungs burned. Ten seconds underwater, maybe fifteen. His diaphragm spasmed, demanding air.
Stroud stopped. Palm flat against the ceiling, testing—then pushed off and swam again. Wrong spot. No air. Cold sapped heat through Yuji’s soaked clothes, through his skin. His fingers cramped around Stroud’s forearm. He couldn’t feel his feet.
Twenty seconds. Twenty-five. His chest convulsed. A bubble escaped his lips and he didn’t know which direction it went—up was meaningless when the whole chamber was flooded, when there was no surface.
Stroud changed direction. Current dragged against Yuji’s body. His vision was going—white sparks in the absolute black, brain starving. The urge to inhale was unbearable now. He was going to breathe. He was going to open his mouth and let the water in.
Stroud’s hand found something. The sudden upward thrust, Stroud’s legs driving them both toward a surface that might exist, might not, might be nothing but more stone and more water.
His face broke through.
Air. Stale, mineral-thick—but air. Yuji’s lungs hauled oxygen in a ragged gasp. His arms flailed, found stone, found the rough edge where the scallop formed. Stroud surfaced beside him, coughing.
They clung to the rock, treading water, mouths pressed to the thin layer of air between surface and ceiling. Inches of clearance. Yuji could feel the ceiling on the crown of his head.
“You found—” Yuji choked, coughed. “You found it.”
“Almost didn’t.” Stroud spat water.
Yuji’s arms burned. His legs kicked on automatic, but the cold had stolen most of his coordination. He kept slipping under, fighting back to the surface.
“The peak.” Stroud’s voice was raw. “Feel it? The current’s slowing.”
Yuji couldn’t feel anything but his own heartbeat. But Stroud was right—the surge was gone. The water still pressed against the ceiling, but it had stopped rising.
“How long?” Yuji managed.
“Don’t know. Hour, maybe. Maybe less. These floods come fast and drop fast.”
They floated in the dark, pressed to stone. Yuji’s teeth chattered. His whole body shook—cold, adrenaline burning itself out. Stroud pulled him closer, wrapped both arms around him, and held him against his chest.
“Stay with me.” Stroud’s mouth pressed to his temple. “I’ve got you. Just stay with me.”
Minutes passed—five, fifteen, impossible to know. Cold ached in his bones, locked his jaw. Stroud’s body was the only warmth, chest against Yuji’s back, arms wrapped tight, both of them treading just enough to stay afloat.
“Still dropping?” Yuji’s teeth chattered around the words.
“Can’t tell yet.”
They waited. The roar had faded to a steady rush, water still pouring through whatever gap fed this chamber.
Yuji’s legs burned from the constant motion.
He tried to rest them, let Stroud bear more of the work, but the ceiling pressed too close—every time he stopped kicking, his face dipped toward the surface.
Then his shoulder brushed stone where there’d been nothing before.
“Stroud.”
“I felt it.” Stroud’s arms tightened. “Don’t get excited. Could be debris.”
But it wasn’t debris. The next brush came lower—mid-back, then hip. The water dropped inch by inch, the flood draining back through the canyon it had filled.
Yuji’s chin lifted clear of the surface. He gasped, sucked in air that tasted like wet limestone and his own fear. His shoulders emerged. The cold hit different now, air against wet skin, and he shook harder.
“Easy.” Stroud’s breath warmed his ear. “We’re okay. Just a little longer.”
More waiting. The water fell past his chest, his waist. His feet found the ramp—slippery, the slope they’d climbed before the flood. He couldn’t hold his own weight. His knees buckled the moment he tried.
Stroud caught him, lowered them both to the wet rock.
“You’re okay.” Stroud’s mouth close to his cheek. “We made it.”
Yuji couldn’t speak. His throat locked. He reached for Stroud in the blackness, found the stubble along his jaw. Stroud pulled him close until their foreheads touched.
The chamber quieted. Water still dripped from the ceiling, still pooled on the floor, but the roar was gone.
Stroud’s thumb traced Yuji’s cheekbone. “You stopped moving. Right before I found it—you went still.” His grip tightened on Yuji’s neck. “Thought I’d lost you.”
“I’m here.” Yuji turned his face into Stroud’s palm. “Still here.”
They held each other in the dark, wet clothes clinging, bodies shaking. The spring still pulsed from its fracture, warm water mixing with cold runoff.
Yuji closed his eyes and let himself be held.