[SCENE 1]

Leo didn't sleep. He lay on Shell's couch staring at the ceiling, listening to the water treatment plant hum through the walls, running Karl's last word through his head.

Mako.

The name didn't fit the shape of the threat. Mako was blunt, uncurious, transactional. He bought salvage, he paid cash, he didn't ask questions. The kind of man who'd been on Tidecrest so long that nobody questioned his presence the way nobody questioned the barnacles on the pilings.

But Karl had watched twelve divers for two years. He'd charted their patterns, logged their depths, recorded their schedules. And the one who'd changed — the one who'd started diving deeper the same night the shore frequency stopped — was Mako.

Leo turned his head. Through the kitchen doorway, Shell was already up. Her laptop glow reflected off the cabinets. She was typing fast, the way she did when she was chasing data.

"You're not sleeping either," Leo said.

"No." She didn't look up. "I've been in the Tidecrest dock registry since four AM. Pulling Mako's dive logs, his equipment purchases, his restricted-zone waivers."

"And?"

Shell pushed the laptop across the table. The screen showed a spreadsheet — dates, amounts, item descriptions, all organized in Shell's characteristically precise columns.

"Look at the air tank purchases," she said. "Mako buys compressed air on a regular two-week cycle, same as every diver on the lower dock. Standard. But starting three years ago — October 2031 — the cycle changed. He started buying double. And he switched from standard aluminum tanks to steel composite."

Leo leaned forward. "Steel composite holds more pressure. Deeper rated."

"Rated to sixty meters on standard config. With modified regulators, eighty. He's been buying modified regulators every six months since October 2031. Eighty-meter rated equipment for a man who officially dives to forty."

"The logs say forty?"

"The dock register says forty. His restricted-zone waivers list a maximum depth of fifty-five, and he's only filed two of those in three years. But the equipment doesn't match the paperwork."

Leo stared at the numbers. The spreadsheet was clean, factual, unambiguous. Mako had been buying deeper-rated gear for three years while officially staying shallow.

"Why didn't this come up before?" Leo asked.

"Because nobody was looking. Dive logs on Tidecrest are self-reported. Nobody cross-references the equipment purchases against the declared depths. Hargrave processes the waivers but doesn't audit the actual dives. It's an honor system."

"Which Mako has been exploiting."

Shell closed the laptop. "Or which he's been using for something else entirely. The equipment could be for anything — curiosity, profit, recovery salvage from deeper wrecks. None of that explains thread-cutting."

"No. But the timing does."

Shell nodded. October 2031. The same month Karl heard the frequency from the shore. The same month the frequency stopped. The same month Mako started buying equipment that could take him far deeper than he'd ever gone before.

"What about the package?" Leo asked. "Karl's journal — you said there was a reference to a delivery at the lower dock?"

Shell pulled up a second window. "Karl noted it in an entry dated October eleventh, 2031. He was watching the dock at night — he did that a lot after he lost his transformation, patrolling the lower rings. He saw a delivery come in on the last cargo run of the evening. No return address. Logged in Hargrave's manifest as 'salvage materials, miscellaneous.' Karl wrote: 'The frequency changed after that delivery. Sharper. More patterned. Like someone tuned it.'"

"And this delivery went to Mako?"

"Karl doesn't say who received it. The cargo runs were shared — anyone on the lower dock could have picked it up. But Mako was the only diver who changed after that night."

Leo stood. His legs were stiff, the surface gravity still feeling slightly excessive. He stretched, felt the gill-slits pulse under his jaw, and walked to the window. The lower dock was visible below — a concrete shelf jutting into the water, dotted with mooring cleats and coiled lines. Mako's shop was at the far end, a converted shipping container with a hand-painted sign.

"We can't confront him," Leo said.

"Obviously not. We have no proof that the equipment purchases connect to thread-cutting. We have Karl's observation, which is twelve years old and based on a frequency he couldn't identify. If we push Mako and he's innocent, we've burned a relationship with a dock vendor for nothing. If he's not innocent, we've warned him."

"So what do we do?"

"We watch. We wait for him to make a mistake. And we do the GPS photo dive this morning because the Board spot-check doesn't care about Mako — it cares about your paperwork."

Leo looked at the clock. Six forty-seven. The dive was scheduled for seven-thirty, off-hours dock access that Hargrave had arranged.

"Ready?" Shell asked.

"No. But I'm going anyway."

[SCENE 2]

The water at sixty meters was familiar. Too familiar. After the chamber at three-seventy and the bypass seal at Junction Seven, sixty meters felt like standing ankle-deep in a bathtub. The gill-slits operated effortlessly. The pressure was nothing — his Stage 1 tolerance handled it without engaging the deeper protocols.

Leo descended along the anchor chain, the registered standard knife clipped to his belt. He'd brought the waterproof sample container Hargrave had given him, rigged with a GoPro housing that Shell had modified with a GPS module. The photos needed to show Leo at depth with the registered knife, timestamped and geotagged. Simple forgery. The kind of lie that only fell apart if someone dove to sixty meters and looked for themselves.

At sixty meters, Leo stopped. The water was green-gray, visibility about four meters. A school of rockfish scattered as he settled near a concrete block — one of Tidecrest's abandoned mooring weights, half-buried in silt. He unclipped the sample container, aimed the GoPro at himself, and took the first photo.

The GPS module blinked green. Coordinates logged. Depth: 61.3 meters. Time: 0741 hours.

He took four more. Different angles. One with the knife visible against his thigh. One with the anchor chain in frame. One wide shot showing the concrete block and the mooring line disappearing upward. One close-up of the knife blade against his palm, the standard steel catching what little light filtered down.

Five minutes. The entire fabrication took five minutes.

Leo clipped the container back to his belt and began the ascent. At forty meters, the System overlay flickered — not a warning, just the normal background process of weave-perception operating at the edge of conscious awareness. The threads in this zone were shallow, surface-level connections. Most were stable. The fraying that had plagued deeper waters hadn't reached this shallow yet.

At twenty meters, he broke the surface and the gill-slits sealed. Air hit his lungs like a wall. He treaded water, pulled his head above the surface, and spotted Shell on the dock.

"All clear," she called down. She was holding her phone, the GPS tracking app open. "Five photos logged. Coordinates match the dive log entries for this morning."

Leo swam to the ladder and hauled himself up. The dock felt wrong again — his body oscillating between water-adapted and surface-adapted, the transition zone where neither set of senses worked properly.

He sat on the dock edge and breathed. The gill-slits ached as they sealed. The water dripped off his wetsuit and pooled around his boots.

"Done," he said.

"Done." Shell pocketed her phone. "That's the photo requirement satisfied. Kessler can check the GPS data against the dive log and it'll match. The rest of the logs—"

She stopped. Her eyes had moved past Leo, to the far end of the lower dock.

Leo turned. Mako's shop was sixty meters away. The shipping container's door was open, and Mako was standing in the doorway, looking directly at them. He wasn't doing anything — just standing there, arms at his sides, watching. The morning light hit him from behind, leaving his face in shadow.

Leo held his gaze for three seconds. Mako didn't move.

"Did he see the dive?" Leo asked quietly.

"The observation platform has a direct line to the entry point. If he was up there this morning, he saw everything."

"Did you see him on the platform?"

Shell's silence was the answer.

Leo stood. His legs shook. He slung the gear bag over one shoulder and walked past Mako's shop without looking at it. Shell walked beside him, her pace matching his, her eyes forward.

Neither of them spoke until they were past the access ramp.

"He's watching," Leo said.

"Yes."

"He knows I dove this morning. He doesn't know why."

"Or he does know why, and that's worse."

[SCENE 3]

Leo went to Mako's shop at noon. Not because he wanted to — because avoiding it would be worse. Suspicion had a shelf life; the longer it sat, the more it warped. Better to get close, read what he could, and leave before the conversation turned.

The shipping container was cool inside. Mako kept a dehumidifier running at full capacity, and the air smelled like machine oil and old rope. The counter was a repurposed diving board, scarred with knife marks and water stains. Behind it, rows of shelves held compressed air tanks, regulator assemblies, coil after coil of line in various thicknesses. The salvage trade's inventory: everything a diver needed, nothing a diver couldn't get elsewhere.

Mako was behind the counter when Leo walked in. He was sorting regulator parts, his thick fingers moving with surprising precision. He didn't look up.

"Mako."

"Leo." A pause. "Heard you were out early this morning."

The statement landed flat. Not a question. Not an accusation. Just a fact, offered without weight.

"Photo requirement," Leo said. "Board spot-check. I needed GPS-tagged images at depth to satisfy the inspector."

"Sixty meters?"

"Sixty meters."

Mako nodded slowly. He set a regulator diaphragm down on the counter. "That's deep enough for the GPS module to register. Hargrave arrange the dock access?"

"Yeah."

"Hargrave arranges a lot for you." Another flat statement. This one had edges.

Leo leaned against the doorframe. His body language was casual — or he hoped it was. "Hargrave arranges dock access for anyone who files the request. I filed the request."

"You filed the request." Mako picked up another diaphragm, examined it, set it down. "You've been filing a lot of requests lately. Dive logs, equipment registrations, photo waivers. You're either the most compliant diver on Tidecrest or you're covering something."

"That's a strange thing to say."

"Is it?" Mako looked up. His eyes were steady, gray, unreadable. "Your father used to say the same thing about paperwork — that the more of it you generate, the more holes you're trying to paper over."

Leo kept his face neutral. "You knew my father."

"I knew your father better than most people on this dock. I sold him equipment for twenty years. I was the last person he spoke to before his final dive." Mako's voice hadn't changed. The same blunt cadence, the same lack of ornament. "Karl was a man who kept things close. Secrets close. You're like him in that."

"I'm not keeping secrets. I'm complying with the Board."

"Everyone's complying with the Board." Mako wiped the counter with a rag, a gesture that was more habit than cleanliness. "Crowe's complying. Greaves is complying. Rusty is complying. You know why? Because the Board inspection isn't about safety. It's about documentation. Kessler doesn't care if you drowned — she cares if the paperwork says you drowned in the right location."

Leo studied him. Mako's thread-pattern — visible now, in the dim light of the shop, through the weave-perception that never fully deactivated — was wrong. Not dramatically. Not the way an unraveling person looked, threads fraying at the edges, the whole network dissolving. Mako's threads were dense, tightly woven, the pattern of a man embedded in Tidecrest's social fabric through decades of commerce and proximity.

But there was a gap. A single thread, running from Mako's center to somewhere outside the shop — outside Tidecrest, maybe, or to a point below the surface — that was different from the rest. Not severed. Not fraying. Something else. Shielded. The thread existed but its terminus was hidden, the way a wire disappears into a conduit.

Leo had never seen that before. In twenty years of medicine, he'd learned to recognize normal anatomy by its consistency. This was an anomaly — not a disease, not an injury, but an intentional modification. Someone had done this to Mako's thread network, or Mako had done it to himself.

"You're staring," Mako said.

Leo blinked. "Sorry. Thinking."

"You think too much. Your father did that too." Mako folded the rag and tucked it under the counter. "The Board inspector — Kessler. She arrives in ten days. You'd better make sure your paperwork is airtight. Because she's not the only one who notices when someone on this dock starts acting different."

The words hung in the shop's cold air. Leo pushed off the doorframe.

"Thanks for the advice, Mako."

"Advice is free. Everything else costs."

Leo left. He walked the length of the lower dock without looking back, his pulse steady, the gill-slits pulsing once under his jaw — a reflex, not a response. The shielded thread bothered him more than the verbal exchange. He could explain suspicion, deflection, the social games of a dock community that ran on information and leverage.

He couldn't explain a thread that had been deliberately hidden.

[SCENE 4]

Shell was waiting at the water treatment plant when Leo arrived. She had two coffees and a printout spread across the table — real paper, her preferred method for analysis.

"I talked to Mako," Leo said.

"I know. I watched from the observation platform. What did you see?"

"His threads are wrong. There's a connection — a single thread, high-density, running from his center to a point I can't trace. The rest of his network is normal. Dense, stable, the pattern of someone who's lived on Tidecrest for decades. But this one thread is shielded. Hidden."

Shell pushed a coffee toward him. "Shielded how?"

"Not severed. Not frayed. Modified. The thread exists but I can't see where it terminates. It's like — you know how fiber optic cables have a cladding layer? Something covers the outside that blocks the signal from leaking. This thread has that. A coating."

"A coating made of what?"

"I don't know. Abyssal Steel, maybe. The same material that makes up the node, the anchoring protocol, the knife. If Abyssal Steel can be worked into the thread network—"

"Then whoever coated that thread understood the network well enough to modify it." Shell picked up the printout. "Which brings me to this. I pulled Mako's cargo receiving records from the dock manifest going back five years. The package Karl saw delivered in October 2031 — it wasn't the first. There are seven deliveries to Mako's shop in the two years before October, all logged as 'salvage materials.' All arriving on evening cargo runs. All with no return address."

"Seven deliveries in two years."

"And then nothing. The October delivery was the last one. After that, Mako stopped receiving packages."

"Because he had what he needed."

Shell set the printout down. "Maybe. Or because whatever was being delivered was complete." She picked up her coffee. "The GPS photos?"

"Five images. Coordinates match the dive log. Timestamp is clean. Kessler will accept it."

"Good. That removes one pressure." Shell paused. "But Mako saw you diving. He commented on it when you walked into the shop. He knows you went to sixty meters this morning, and he knows why — the Board compliance. He's connecting the dots, Leo."

"He's connecting dots that don't lead anywhere dangerous. The photo dive was legitimate — I was at sixty meters with a registered knife. The fact that I also go deeper is something he can't prove."

"He can watch."

"So can we."

Shell looked at him. "You want to follow Mako?"

"I want to know where that shielded thread goes. If I can get close enough to see the thread pattern from a different angle — not from the front, where he can see me watching — but from behind, from the side, somewhere he doesn't know I'm looking—"

"You'd need to be within line of sight at close range. In his shop, on the dock, somewhere he's stationary. And if he catches you—"

"Then I'll have to explain why I was staring at him."

Shell almost smiled. Almost. "Your father would be proud. Or horrified."

"Both, probably."

She gathered the printouts and slid them into a folder. "The board countdown is at ten days. The GPS photos are handled. The dive logs pass. Kessler's going to be looking at paperwork, not at thread patterns or Abyssal Steel or anything we can see. She's going to come, she's going to check the boxes, and she's going to leave. That's the surface problem, and it's solved."

"And the other problem?"

"The node. Forty-one percent. That's where the real stakes are. If the node keeps recovering, the thread network stabilizes — at least the fracture-based damage stops. But the deliberate cuts don't stop just because the node is working. Someone is still cutting, Leo. The node told you forty percent of the damage was deliberate. If the node stabilizes at full capacity, the fracture damage disappears but the cuts remain. And whoever made them will keep making them."

Leo looked at the folder in Shell's hands. Seven deliveries. A shielded thread. A man who'd been diving deeper than anyone knew for three years while the paperwork said otherwise.

"Karl said the frequency from the shore stopped the night Mako made his first deeper dive," Leo said. "But what if it didn't stop? What if it just went underwater?"

Shell paused, the folder halfway into her bag. "You think Mako's been transmitting from below the surface."

"I think something changed in October 2031. The signal moved. The deliveries stopped. Mako started diving deeper. And the severance trail I found at two-eighty — clean cuts, high-density junctions, a pattern that doesn't match any maintenance protocol — started around the same time."

The water treatment plant hummed. The coffee cooled on the table. Through the window, the lower dock was visible in the afternoon light, Mako's shop a dark rectangle at the far end.

"I need to go back down," Leo said. "Not to Junction Seven. Not to the structure. To sixty meters. Right where I took the GPS photos this morning."

"Why?"

"Because if the severance trail starts near the surface, that's where the cuts will show first. And if Mako has been diving to sixty meters for three years—"

Shell looked at him. "You think there's a fresh cut at sixty meters."

"I think there might be one right where I was standing two hours ago. And I think whoever made it was watching me take the photos."

The plant hummed. The water outside was flat and gray. Ten days until Kessler arrived. Forty-one percent node recovery. One shielded thread that Leo couldn't trace.

Leo picked up his coffee and drank it cold.