Read Chapter 2: Descent Protocol

The submersible hung in the launch bay like a dark, patient insect. Jack Mercer ran his gloved hand along its hull, feeling the cold through the rubber. The *Barracuda*. Five years old, two hundred dives on her frame, and she still smelled like machine oil and someone else’s fear.

“You’re sure about this one, Mercer?”

Jack didn’t turn. The launch bay’s intercom crackled with the voice of Arthur Finch, the surface controller who’d been assigned to babysit him. Finch had the kind of voice that lived in the back of the throat, perpetually skeptical.

“I’m sure about the pay,” Jack said. “The rest is negotiable.”

He popped the hatch on the equipment locker and pulled out the schematic rolls. The station schematics were updated six months ago, stamped with the ADRS logo—a stylized wave with a star at its center, like some kind of maritime flag of convenience. He spread the first sheet across the gantry’s small workbench, weighting the corners with a wrench and a coffee mug someone had left behind.

Atlantic Deep Research Station. ADRS. A habitat pod cluster anchored at two thousand meters, connected by pressurized walkways. Living quarters, mess, lab module, observation dome. All of it sitting on the edge of a geological feature they’d started calling “The Scar.”

Jack traced the line with his index finger. The Scar was a fissure in the seafloor, a crack that ran nearly a kilometer long and a hundred meters deep at its narrowest. The station’s remote excavation rigs had been pulling core samples from it for months. The research briefs he’d skimmed on the surface mentioned sediment chemistry, thermophilic bacteria, something about “deep-sea biome isolation.” The kind of language that meant scientists were excited and no one else was.

“That’s the site of interest,” Finch said over the comm, as if reading Jack’s mind. “The last automated pings from the excavation rigs stopped twelve hours before the station’s mayday.”

Jack grunted. He rerolled the schematic, then paused. A second drawing was tucked behind it—a smaller diagram, older, the paper yellowed at the edges. It showed a different station layout, a different era. The *Neptune*, his brother’s ship. Charlie Mercer had gone down on a deep-water salvage operation near the Mid-Atlantic Ridge eight years ago. The official report said equipment failure. Jack had never believed it.

He’d never told anyone that. It was just a bad feeling, a knot in his gut that had never come undone.

He folded the old schematic into a tight square and tucked it into the breast pocket of his dive suit, next to the brass watch that hadn’t ticked in eight years. Charlie’s watch. On the back was an inscription: *SOME DAYS ARE LIKE THAT. — C.M.*

The weight was small but familiar.

“Check your comms,” Finch said. “I want a clean channel before you’re in the water.”

Jack climbed into the *Barracuda*’s cockpit. The seat grabbed him like it remembered his shape. He’d spent so much of his life inside these things—submarines, submersibles, one-man pods—that the fit felt like coming home to a house with no windows.

He ran through the pre-dive checklist. Ballast. Trim. Life support. Propulsion. Comms. Electrical. The display blinked green across the board, except for one small caution on the nav lights, a flicker he’d seen twice before but never reported. It was the kind of thing that only surfaced under pressure.

“Course locked for ADRS,” Jack said. “Begin descent protocol.”

“Hold.” Finch’s voice had a new edge. “You see the last message from the station? The one before they went dark?”

“I saw the log summary.”

“Here’s the raw audio. Listen to it.”

A beat of silence, then a burst of static. Faint, underwater-sounding, as if the transmission had traveled through layers of wet wool. Then a voice. A woman, or maybe a man with a high register. It was hard to tell through the distortion. The word came through broken, chopped into two halves.

“…safe.”

Silence. Then static. Then nothing.

Jack sat with the word in his head. “That’s it?”

“That’s it. No distress code, no coordinates, no request for extraction. One word. Safe.” Finch paused. “We have procedures for maydays, Mercer. We have protocols for silence. We don’t have a protocol for a station saying it’s safe and then refusing to answer for two days.”

“So you’re sending me down anyway.”

“We’re sending you down to find out why they went quiet. If they’re fine, we want a thumbs-up and a status report. If they’re not fine, we want to know what happened. Either way, we need answers. You understand?”

Jack understood. The surface loved answers. The deep had a habit of taking them back.

“Copy,” he said. “Initiating descent.”

The launch bay flooded with a roar that turned instantly muffled as the water took the sound. The *Barracuda* detached from the gantry, and Jack felt the familiar, stomach-tilting drop as the cradle released. He used the thrusters to stabilize, rotating the bow downward. The lights of the launch bay shrank behind him, and then there was nothing but the dark.

He kept his eyes on the instruments. Depth reading. Pressure. Temperature. The descent was slow, deliberate. He was in no hurry. Hurry was what got people killed down here. You moved fast, you made mistakes. You made mistakes, you didn’t get a second chance.

The sonar pinged. Flat seabed below, unbroken for miles. The ADRS’s marker beacon should have been broadcasting from two thousand meters out. He checked the readout. The beacon was transmitting, but weak. Faint. As if something had partially swallowed its signal.

Forty minutes in, a second sonar anomaly appeared off his southern flank.

“Finch, you seeing that?”

A pause. “I see your telemetry. Not seeing anything on our end that matches.”

It looked like a submerged object, roughly cylindrical, floating at about half the depth distance between the surface and the seafloor. Not large—maybe five meters long—but solid enough to leave a sonar shadow.

“Could be a cargo pod,” Jack said. “Lost in transit.”

“No lost-pod reports on file.”

Jack tightened his grip on the thruster controls. The object wasn’t moving. It hung there, inert, patient. Something about its shape was wrong—too perfectly cylindrical to be rock or debris. He adjusted his course, drifting slightly south to get a better look.

The sample pod from one of the excavation rigs. He recognized the outline now, a familiar standard-issue unit used by the station’s deep-sea probes. But this one had coral growth crusted on its nose, like it had been sitting on the seafloor for a while before being displaced.

“That’s debris from the excavation site,” Jack said. “The Scar.”

“Can you identify it?”

“It’s a sample pod. Empty, maybe. They’re designed to return to the surface automatically after collection.” He frowned. “Something tripped it early.”

“Or something pushed it,” Finch said.

Jack’s throat tightened. He forced his breathing to stay steady. “Not in the job description to overthink debris. I’ll note it in the log.”

He angled the *Barracuda* back toward the station’s beacon, which was pulsing now with a healthier signal. The descent resumed, faster now, the pressure gauge climbing as he pushed the submersible through the upper margin of the thermocline. The cold seeped through the hull, a cold that had nothing to do with the water and everything to do with what he was heading toward.

Charlie’s watch pressed against his chest, an old and useless comfort.

“What do you know about the station’s lead biologist?” Jack asked. “Voss.”

“Dr. Elara Voss. Marine microbiologist. Was heading up the Scar’s deep-biome study. Published some papers on extremophile organisms. Kept a low profile otherwise.”

“Crew roster?”

“Twelve souls on site. All accounted for on paper. No one’s family has reported a missing-person situation, because no one’s been able to get through to them.” Finch’s voice was sour. “The last scheduled check-in was supposed to happen four hours after the mayday. It didn’t.”

Jack glanced at the comm unit. “Any other transmissions? Even passive signals?”

“Nothing but that one word. We’ve triaged it a thousand ways. It’s clean, no code, no steganography. It means what it says.” Finch’s tone was flat. “They said they were safe. Then they stopped being reachable.”

“Maybe they meant it safe from outside,” Jack said.

“What?”

“They said safe. Not fine. Not operational. Safe. Like there was something they needed to be safe from.” Jack shook his head. “Don’t mind me. I read too many old dive logs.”

The comm went quiet for a long moment. Then Finch said, “The station’s beacon is starting to align. Should have visual on the dome in ten minutes.”

Jack looked through the viewport. There it was—a glint of light against the black, a pinprick of man-made gold in a wasteland of darkness. The ADRS, sitting on the edge of the Scar like a captain waiting to go down with his ship.

He let his hand drift to Charlie’s watch. It was cold against his palm. He pressed it gently, just to feel the metal, the weight.

“I’m going in silent,” Jack said. “No wake call.”

“Risky. We can’t verify you’re alive if you stop talking.”

“You’ll know I’m alive if the station’s beacon goes dark,” Jack said. “That’s all you need.”

He cut the comm himself and let the *Barracuda* drift the final hundred meters in silence, watching the station grow larger, more detailed, until he could see the barnacles crusting the docking ring and the faint smear of algae that meant the exterior pumps had stopped cycling.

The airlock was dark. No lights. No activity. The habitat looked empty.

But as Jack lined up the docking clamp, a single flicker of light passed across the observation dome’s window. Brief. Almost imperceptible. Like a face moving past a candle.

The clamp engaged. The hull groaned.

Jack exhaled. He’d expected to be the only one here. But something had moved inside that station, and now he had to decide whether he was going in to find them or find what was left.

The decision had already been made the moment he’d pocketed Charlie’s watch.

He reached for the airlock release.