He went in at nineteen hundred, when the facility's shift change reduced the monitoring staff by half and the three personnel at the shaft entrance were occupied with an argument between two certified divers and the access restriction protocol.
Daveth was already past the first level when Kiran reached the shaft. No discussion at the entry point, no notice filed — the ministerial authorization for physical barriers was still six hours away, and six hours was more than he needed to be below the bureaucracy's reach.
He went down the first corridor steps and the facility's fluorescent light went away and the Abyss's bioluminescent amber came up and his body registered the change the same way it had registered the light change at Floor 253: not relief, not homecoming. The biological environment recalibrating to a medium it had been calibrated to for fourteen months.
The whisper was immediately louder.
Floor 5 and it was already louder than it had been at the facility, at the surface entry, at Floor 253. The broadcast amplitude increased with depth the way pressure increased with depth — consistent, physical, measurable. By Floor 20 it would be clear. By Floor 50 it would be impossible to ignore.
"Signal check," Daveth said. He was at the Floor 5 junction with his equipment running. The tactical display showed entity signatures. Floor 5 nominal. "Surface comms still good from here."
The communication device Mira had given him — a modified Dive Authority unit she'd had the monitoring station adapt for extended depth range — was in his gear. It would hold signal to approximately Floor 60 before the architecture's interference degraded the connection. After that: silence until he resurfaced.
"Good," Kiran said. "Move at pace."
---
The upper floors had changed.
He'd expected the entity migration, the higher densities that Marek had implied and that the facility's monitoring had confirmed. What he hadn't expected was the quality of the change.
The entities on Floor 12 weren't avoiding him. Not the caretaker code's effect — the code wasn't active this far from the wound, the biological distance too great for the frequency to carry. The entities on Floor 12 were simply not engaging. Not because he'd triggered their hesitation response, but because they were oriented in a different direction.
Down.
He stopped at the Floor 12 seam junction and watched three entities move through the floor's interior without registering his presence at all. Mid-metabolic signature, the kind of entity that should have been actively hunting at this depth. They were moving with the specific directional behavior of a migration — fixed orientation, consistent pace, the movement of organisms responding to a large-scale biological signal.
"They're all heading toward the wound," Daveth said. He'd noticed too.
"The broadcast is pulling them," Kiran said. "The entities aren't separate from the Abyss's biology — they're part of it. The wound's amplified signal is affecting the whole ecology."
"Including the things that should be hunting us."
"Yes." He watched the three entities move through the floor and away. "The upper floors are going to be effectively clear for another few days while the migration is in progress."
"And the lower floors are going to be very crowded," Daveth said.
"Yes."
They moved on.
---
The evidence of the divers who had preceded them was everywhere below Floor 20.
Not all of it was the kind of evidence he'd been expecting from reading abandoned packs at the surface. Some of it was: equipment left at junctions, emergency beacons dropped or discarded, water containers empty. Three more packs, orange surface-issue, placed with the same deliberate care as the ones at Floors 262 to 254.
Some of it was different.
At Floor 23, someone had written on the worked stone wall in chalk — a surface item, not something anyone would have brought from the deeper floors. The writing was careful: a name, a date, a message. He read it. A woman's name, written in someone else's handwriting. A date three weeks ago. The message: *She asked me to keep going. I'm keeping going.*
At Floor 28, a small pile of objects at a seam junction. A wedding ring. A child's drawing, laminated. A driver's license photograph, cut from its card and protected in a plastic sleeve. Objects that had been carried to this depth and then set down here, at this junction, as if the junction were a threshold that required them to be left behind.
Like a toll.
He looked at the objects and recognized the specific economy of grief — the way it carried things until the weight became insupportable and then required a place to set them down. Not abandonment. The opposite of abandonment. A marking of the threshold.
"These were left on purpose," Daveth said.
"Yes."
"For the wound."
"For whatever they believed was on the other side of the door." He looked at the laminated child's drawing. "Leave them."
They left them and went down.
---
The communication device lost surface contact at Floor 58.
He'd been checking in with Mira every ten floors. The last check, at Floor 58, she'd given him the monitoring station's current readings: collection signal running at high output, seventeen new response events in the last twenty-four hours, the physical access barriers now in place at the shaft entrance. The barriers were creating a bottleneck but not a stop — people were finding alternative entry routes through the Abyss's surface infrastructure, the secondary corridor access points that existed for emergency evacuation and hadn't been designed to resist people trying to get in.
"The count as of thirty minutes ago," she said, over the signal that was degrading to static: "Forty-nine people currently inside the Abyss's tracked range. Depth estimate, based on the access timing, suggests the deepest are at Floor 65 to 70. Five confirmed casualties since your entry at 19:00."
Five more. In the twenty-four hours since Floor 42.
The device went to static at Floor 58. He pocketed it and kept moving.
---
Below Floor 60, the entity migration had redistributed the floor ecology in ways his fourteen months of experience hadn't prepared him for.
The floors he'd known as hostile — 65, 67, 71, 75, the floors below the sanity line where entity density was highest — were operating at reduced activity. Not empty, but the high-metabolic hunting entities had moved down, their patterns following the wound's signal, the biological pull of something in the Abyss's deepest architecture calling everything that was part of that biology toward it.
What had moved in to fill the space was different.
He noticed them first at Floor 65: smaller entities, low-metabolic, the kind that occupied ecological niches cleared by larger organisms. Nothing he recognized. Their shape was organic but not in any of the categories his fourteen months had given him for organism types at this depth — not the pilotfish pattern, not the caretaker code's recognized forms, not the standard hunter-predator profile.
They moved in groups. They moved toward him and then stopped at approximately three meters and oriented themselves in his direction without approaching further.
"What are those?" Daveth said.
"New to me," Kiran said. He stood still and let the nearest group orient. His pulse-rhythm integration registered their biological signature: low metabolic output, a frequency pattern he didn't have a category for, something that was present in the signal and also something else. "The signature has a component I recognize."
"Which component?"
He looked at the nearest group. Three of them, roughly the size of his fist, the body plan suggesting something that moved through worked stone the way fish moved through water. Low-metabolic but active. Oriented toward him with the specific attention of organisms responding to a recognized signal.
"The caretaker code," he said. "They're reading the caretaker code. But the code isn't active at this depth."
"Then why are they responding to it?"
He looked at his void-skin. The dark markings, the biological architecture that the wound had been building into his skin for fourteen months. The caretaker code's signal was in the void-skin the way the wound's timing was in Markos's parietal neurons — not as an active broadcast but as a structural feature.
These organisms were reading his biology directly.
"They recognize the wound," he said. "The void-skin's structure is derived from the wound's biology. These entities are oriented to the wound's biological signature — not the code's broadcast, the underlying structure."
"Organisms that recognize the wound's biology," Daveth said.
"Deep floor organisms. They've migrated up with the rest of the ecology." He looked at the group of three. They hadn't closed the three-meter gap. "I think these are from below Floor 200."
Floor 200 entities at Floor 65. The migration was reaching further than the surface monitoring had captured.
"Are they hostile?" Daveth asked.
He looked at them. Three meters. Oriented. Not approaching.
"No," he said. "I don't think they're equipped for it."
---
They made Floor 85 at twenty-two hundred.
The descent had taken three hours. Faster than he'd moved on the way out — no formation to maintain, no Markos to carry, no formation of forty-four soldiers operating at the pace of their least adaptable member. Just him and Daveth moving at the pace that fourteen months and six months of below-line experience respectively could sustain.
Floor 85 was Marek Vorn's last known depth before his fourteen months of descent. It was different from the facility's twelve-day-old readings: the entity density was down, the migration had pulled the floor's regular ecology toward the lower levels, and what remained was the floor's ambient biology running at lower activity than usual.
In the floor's seam network, someone had left a message.
Cut into the worked stone, below the seam's standard marking height, at the height of someone who had been crouching: a symbol he recognized. The wound's notation, the biological language of the floor's tissue — but in cut stone, not in living architecture. Someone had translated the wound's notation into carved marks.
"Markos," he said.
Daveth crouched beside the marks. "The meaning-reader?"
"The wound's notation. Markos could read it. The marks here are in the wound's script." He looked at the cut depth, the height from the floor, the blade angle. "But Markos is in the medical bay."
"So who cut this?"
He looked at the marks. The wound's notation, carved into the seam stone at Floor 85. The height of someone crouching or someone shorter than average.
Someone who had been in the wound long enough to learn the notation. Someone who had been below Floor 85, deeper, in the wound's immediate biology.
Marek Vorn.
Marek Vorn had learned to read the wound's notation in his fourteen months of descent. Had left a message in the wound's script at his original last-known depth.
"Can you read this?" Daveth asked.
"No," Kiran said. "I can't read the notation. Markos translated for me."
He stood in the Floor 85 seam with the wound's notation cut into the stone above the access junction and Markos in the medical bay seventy floors up with adapted parietal neurons firing in complex sequences, and thought about the two of them — the meaning-reader and the notation in the stone — separated by seventy floors of Abyss architecture and six hundred meters of worked stone and whatever the wound had been doing to both of them during the descent and the ascent.
The message would have to wait.
"Down," he said.
Daveth stood. He checked his equipment, checked the entity signatures on the tactical display, checked the route below. Floor 90, 100, 110. The deeper floors. The wound's proximity, and the wound-tissue pocket resuming its signal, and the caretaker code coming back online, and the door waiting in the sealed cavity under the deeper authority's construction with its collection signal running and its seventeen-times-baseline broadcast and its eleven thousand years of patience.
"Down," Daveth confirmed.
They went.
