Trenchcoat Gills

About This Novel

Trenchcoat Gills is a noir · hydro-noir detective novel, following Here are the detailed character profiles for Trenchcoat Gills, focusing on the 8 most pivotal characters:, a waterlogged pi with a rusted submersible and a trenchcoat full of ghosts.

Opening Line

"*Date: 14 years prior to current record."

**DEPTH REPORT — MERIDIAN CITY LOG, RECOVERED FRAGMENT**

*Date: 14 years prior to current record. Classification: Restricted.*

*Submersible* Thorn *lost contact at 280 meters, Sector 7-G, during routine deep-mapping expedition. Last transmission fragment: "The vent is real. Tell Maren—" Transmission ends. Search and rescue suspended after 72 hours. Cartographer Lorin Thorn presumed dead. Cause of loss: unknown. Investigation closed by order of the Oxygen Authority.*

*Note appended in a second hand, ink smudged: The sea keeps what it takes.*

---

The coffee was cold and the map was lying to me.

I'd been staring at the Shallows for the better part of an hour—my own handiwork, rendered in ink over the better part of a decade. Every salvage run, every missing person, every body I'd pulled from the green dark. The paper had buckled under the weight of its own annotations: hidden passages in blue, dead ends in red, and the places I was afraid to go circled so many times they'd worn through to the corkboard beneath.

The Rustbucket hummed around me. A low drone of pumps and recycled air I'd long since stopped hearing. The converted shipping container sat moored in the flooded atrium of what had once been an office tower, back when office towers had been above water instead of in it. My home. My office. My tomb, if the mooring lines ever gave out.

Outside the salt-crusted porthole, the Shallows glowed a faint, bilious green—the phosphorescent algae panels doing their evening dim. The city was settling into its night rhythm, which is to say the pumps were still humming and nobody was drowning, at least not yet. Somewhere above me, the Spire was catching the last of the sun, its residents breathing filtered air and pretending the ocean didn't exist. Down here, we knew better.

I lifted the mug. Remembered it was cold. Set it down again.

I'd killed the main light hours ago, but the algae panels still pulsed against the walls, the way a corpse's skin turns after too long underwater. The air tasted like old pennies and salt—not the sea's salt, but the tang of sweat and rust and processed oxygen. I reached for the pen beside the map, meaning to mark another location. A salvage job in the old financial district. A woman who'd gone missing from her quarters three weeks ago.

The pen hovered.

I didn't write anything.

The door chimed.

I checked the time—a habit from years of clients who arrived at hours that suggested they didn't want to be seen. Late. Late enough that the markets had closed and the corridors had emptied. Late enough that anyone with legitimate business was home, breathing their rationed air and pretending they weren't afraid.

The door chimed again.

I pushed back from the desk, the chair scraping against metal. Crossed to the door in three strides. Checked the peephole.

A woman. Alone. Spire silks—waterproofed, shimmering faintly under the corridor's green light. Her face was the kind that had once been soft and was now sharpening with worry, the lines around her mouth cut deep by something more than age. Her dark hair was pulled back severely. Her hands were clasped in front of her like she was holding onto something that might otherwise slip away.

I opened the door.

She looked at me. I looked at her. The pumps hummed.

"You're Maren Vesque," she said. Not a question.

"I am."

"My name is Dr. Anya Ferris. I'm a marine biologist with the Oxygen Authority." She paused. I watched her throat work. "I need you to find someone."

I leaned against the doorframe. "You're from the Spire. You have resources up there. Why come down to the Shallows to find a private investigator who lives in a shipping container?"

"You're direct."

"I'm tired. It's late. And you're a long way from filtered air." I crossed my arms. "What's your problem, and how much are you paying me to make it go away?"

Something flickered across her face—relief, maybe, or the first sign of hope she'd felt in days. She reached into her coat and produced a waterproof tablet, polished to a mirror shine. Her hands trembled as she held it out.

"I need you to find Lin Xiaoli."

The name hit me like a pressure change. I kept my face still, but something shifted in my chest—a small tectonic movement I couldn't name. Lin Xiaoli. My sister. Five years gone, and I'd stopped saying her name out loud because it hurt too much to hear it in my own voice.

I took the tablet.

The screen glowed to life, revealing a sonar image. It took me a moment to parse what I was seeing: a ghostly outline rising from the abyssal plain, its slopes scarred with what looked like volcanic vents. The image was grainy, shot at depth, the kind of resolution that came from military-grade equipment or a very expensive salvage operation.

"Beautiful, isn't it?" Ferris said. "Terrifying and beautiful. Like most things that can kill you."

"Where is this?"

"That's the problem." She stepped closer, and I caught the smell of her—clean air, processed water, the faint chemical tang of the Spire's filtration systems. "It shouldn't exist. It's not on any chart. It's not in any database. It's three hundred meters below the Crushing Zone, and according to every official record, there's nothing down there but water and pressure and darkness."

I studied the image again. The seamount's peak rose from the abyssal plain like a cathedral built by something that had never known the sun. I felt the familiar pull of the deep—the same pull that had taken my mentor and my sister and half my hope.

"Why did she map it?"

Ferris's face crumpled. For a moment she looked like she might fall apart entirely, and I watched her fight to hold herself together. "Because she believed it could save us. The vent at its base—it's geothermal. If we could tap it, it could power the city's oxygen generation indefinitely. No more rationing. No more fear. She believed she could change everything."

"And now she's missing."

"Three weeks ago. She went down to verify her final readings. She was supposed to be gone three days." Ferris's voice cracked. "She never came back."

I wanted to hand her back the tablet. I wanted to say I was sorry, that I didn't take missing persons cases anymore, that the deep had taken enough from me already. But I couldn't take my eyes off the image. The seamount hung in the dark, patient as stone.

"A woman in the Shallows," I said slowly, "mapping a seamount that doesn't exist, at a depth that should be impossible. And she disappears. You want me to find her."

"Yes."

"Have you gone to the Authority? The enforcers?"

Ferris laughed—a bitter sound. "The Authority is why I'm here. They've shown no interest in finding her. They've shown quite a lot of interest, actually, in making sure no one else goes looking."

I looked up from the tablet. "What are you not telling me?"

She opened her mouth to answer. And then her eyes went wide.

It happened fast. One moment she was standing in front of me, trembling, her mouth open around words she'd never speak. The next, she was clutching at her throat, making a sound like a drowning woman trying to breathe through water that had turned to tar.

"Dr. Ferris?"

She staggered forward. I caught her by the shoulders, felt her body convulse. Her face was going grey, and her gill slits—the fine lines at her neck, the mark of the wet class—were beginning to leak.

Not blood.

Something thicker. Milkier. The color of industrial lubricant, streaked with the red of ruptured tissue. The sour-sweet stench hit me before I understood what I was seeing, and my stomach turned.

"Help," she choked. "Please—"

Her body went rigid. I lowered her to the floor of the Rustbucket, my knees hitting cold metal. Her hands clawed at her collar, and I saw the hydraulic fluid seeping from her gill slits, staining the waterproofed silk a dark, ugly color. It was in her ears now. Her nose. The corners of her eyes.

"Who did this?" My voice was sharper than I intended. "Dr. Ferris. Who did this to you?"

She stared up at me. Her eyes were glassy, already beginning to film over. But there was something in them—desperation, and something else. Recognition. Like she knew me. Like she'd known me all along.

"Find her," she whispered. "Before they—"

The light went out of her eyes.

I sat back on my heels, my hands wet with hydraulic fluid that was already beginning to congeal. The Rustbucket droned on around us, indifferent. The pumps kept pumping. The air kept recycling. The city kept breathing, and somewhere overhead, the Spire caught the last of the sun.

Dr. Anya Ferris lay dead on my floor, leaking machine-blood from every orifice, and I had no idea who had killed her or why.

I checked her neck anyway. No pulse. Of course there was no pulse. Her eyes stared at the algae panels, the pupils shrinking as the light died in them. Hydraulic fluid pooled beneath her cheek, the droplets clinging to her lashes like some obscene mockery of tears.

I reached for the tablet, still clutched in my hand. The screen cast its cold light upward. The seamount's silhouette cut the digital void like a blade.

And then I saw it.

In the lower right quadrant of the sonar image, so faint I almost missed it: a mark. A small, hand-drawn symbol—a compass rose rendered with four interlocked spirals, each one curling in on itself like a wave breaking.

My breath caught.

I knew that symbol. I'd spent four years as an apprentice learning to draw it, learning what it meant, learning to recognize it in the margins of maps that had been old before I was born. Lorin Thorn had carved those spirals into every chart he ever made, each one representing a cardinal direction in the deep: *north, south, east, west—down.* He'd taught me the mark when I was nineteen, his ink-stained fingers guiding mine across the paper.

My mentor. The man who'd disappeared fourteen years ago on a dive to the deep. His body had never been found. His death had been ruled an accident by an Authority that hadn't even bothered to investigate.

He'd touched this map. He'd left his signature on it like a message meant only for me.

And the woman he'd wanted me to find—the woman whose name was on Ferris's lips when she died—

Lin Xiaoli.

My sister.

I sat on the floor of the Rustbucket, the dead woman's blood—or whatever it was—drying on my hands, and I stared at the mark that only my dead mentor could have made. The mark that proved he wasn't dead. The mark that proved my sister's disappearance was connected to his.

The mark that meant I wasn't done with the deep after all.

I'd spent fourteen years avoiding that water. Fourteen years solving small crimes, taking petty cases, mapping the Shallows in careful, safe detail. I'd told myself I was honoring Thorn's memory by staying close to the surface. I'd told myself my sister's disappearance was a tragedy, not a mystery. I'd told myself so many lies I'd almost started to believe them.

I thought of her last message, sent over neural link two months before she vanished: *"The deep's not empty, Mare. It's waiting."*

The seamount filled the screen, its slopes sharp against the digital black.

I stood. My knees protested. My coat—permanently damp, perpetually rank—brushed the fluid as I stepped over Ferris's body. The hydraulic fluid spread, pooling in the cracks of the metal deck.

I opened the wall locker. Pulled out a fresh filter cartridge for my rebreather. Tossed it into a duffel already packed with dive weights and a knife I'd stolen from a dead man in the Deep.

I pulled out my comm unit and dialed a number I hadn't called in months.

It rang three times. Four.

"Vesque." Sula Nadeem's voice was rough with sleep, but there was an edge to it—the alertness of someone who'd learned never to be fully caught off guard. "Do you know what time it is?"

"I need a diver."

A pause. I could hear her shifting, the creak of a cot. "You've got a submersible. Use it."

"The Crushing Zone. Below it, actually."

Another pause. Longer this time. When she spoke again, her voice was different. Careful. "What's down there?"

I turned the tablet in my hand. The seamount glowed in the dark, waiting. Lorin Thorn's mark burned in the corner like a beacon.

"I don't know," I said. "But I'm going to find out."

The line went quiet. I could almost hear her thinking, weighing the risk against the promise of payment, the danger against the thrill of the dive.

"Three hundred meters," she said finally. "That's past the Crushing Zone, Vesque. That's the kind of depth that kills people who don't respect it."

"I respect it."

"Respect isn't enough."

My gaze dropped to Ferris. The hydraulic fluid had stopped leaking, but her eyes were still open, staring at nothing. She'd come to me for help, and she'd died for it. Someone had known she was coming. Someone had poisoned her before she could tell me the truth.

"Then I'll have to be more than respectful," I said. "I'll have to be desperate."

A long silence. Then, Sula's voice, softer now. "What's this really about, Vesque? Who's the woman who's going to come looking for you when you don't surface?"

I thought about lying. I thought about telling her it was just a job, a missing person, a routine investigation that had gone sideways.

But the mark on the map was still burning in my mind. And my sister's name was still echoing in the empty spaces of my chest.

"Her name is Lin Xiaoli," I said. "She's my sister. And I thought she was dead."

I let that hang in the air between us.

"She mapped a seamount that doesn't exist, three hundred meters below the Crushing Zone. My mentor marked the map. My mentor, who's been dead for fourteen years. And the woman who brought me this information just died on my floor, leaking hydraulic fluid from her gill slits."

The silence on the other end of the line stretched.

"Say yes," I said. "Please. I can't do this alone."

I heard Sula exhale. A long, slow breath, the kind that comes before a dive.

"I'll be there in an hour," she said. "Don't do anything stupid before I arrive."

She ended the call.

I lit a cigarette. The flame trembled in my hand.

I sat on the floor of the Rustbucket, the dead woman at my feet, the map in my hand, and I let myself feel the weight of what I'd just set in motion. The water was rising. The air was thinning. And somewhere in the deep, my sister was waiting for me to find her.

Or she was dead, and I was about to drown in the same water that had taken her.

I tilted the screen toward me one last time. Lorin Thorn's mark held steady in the screen's pale wash—a message from a dead man, a promise I couldn't break even if I wanted to.

The sea keeps what it takes.

I'd believed that for fourteen years.

But the deep was giving something back now. And I was already dreading what it would cost me.

"I thought I was done with the deep," I said to the empty room.

The ember pulsed between my fingers.

I wasn't lying.

I was wrong.

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