Aria found Tamsin at 00:43 behind the old slurry pumps.
She was crouched beside a maintenance console with a hand-crank transmitter wired into the dead panel, sending short-burst pings through shielded cable that bypassed Wen's main detectors.
Smart enough to hide.
Not smart enough to outrun Aria.
Aria's two escorts flanked left and right. Tamsin reached for a sidearm and froze when Aria put a blade under her jaw.
"Hands where I can count them," Aria said.
Tamsin lifted her hands slowly. She was twenty-one, freckles across her nose, eyes red from crying or dust or both.
"They have my brother," she said before Aria asked anything. "They sent me his voice. They said one route marker and one charge set and they'd pull him out of detention."
"You planted three caps and a gel satchel under a civilian wave," Aria said. "Don't package that as one marker."
Tamsin shook so hard the blade trembled with her.
"I thought they'd stop the line, not collapse it. They said warning detonation. I swear."
Aria pulled her away from the console and zip-tied her wrists.
"Where's your brother?"
"Sector Five transit hold. I have code phrase." Tamsin sobbed once. "Please. Please don't kill me before I can give you that."
Aria keyed comm.
"Target secured. Alive. Bring Torres and Wen."
---
By 01:05, command had a confession, half a map, and a bigger problem.
Tamsin named two additional placements:
One low-yield charge under Bay Two brace line.
One passive beacon hidden in conveyor mast seven.
"Beacon sends low-power burst every four minutes," she said through shaking teeth. "Not enough for civilian scanners. Enough for military triangulation."
Wen went white. "That's why ridge fire keeps adjusting this clean. They see us breathing."
Torres drew options in fast strokes.
Option A: disarm in place, risk unknown anti-handling triggers.
Option B: evacuate Bay Two now, lose shelter capacity and heat.
Option C: pull beacon first, then shape movement before next fire correction.
Aria pointed at Option C.
"I go now."
Viktor looked at her. "You have been moving for twenty hours."
"So has everyone." She tapped the map. "If beacon stays live, Emma's rescue route gets shelled before we open new shaft."
He hated that she was right.
"Take six," he said. "In and out in fifteen."
"Twelve," Aria said.
"Ten."
"Deal."
---
While Aria moved on mast seven, Viktor went back to the tunnel lip and pressed his mouth to the drainage pipe.
"Emma, status."
Her answer came thin through stone.
"Air's worse. Kids still singing. One crush patient coded and came back. I can hold maybe four hours before CO2 gets ugly."
"We're opening side shaft."
"From where?"
"Old conveyor drift, branch F."
A pause.
"That drift collapsed ten years ago," Emma said.
"Then we'll uncollapse it."
He heard her breathe once, controlled.
"Don't send amateurs with pickaxes," she said. "If you shake this chamber wrong we lose the roof."
"Marcus is on tools."
"Good." Another pause, softer. "Viktor?"
"Yeah."
"Don't turn this into punishment math. Just get us out."
The line hissed and went quiet.
---
At 01:26, Aria called in from mast seven.
"Beacon confirmed. Also not alone up here. Two spotters in civilian coats with military optics."
Shots cracked in the background.
"You engaged?" Viktor asked.
"No, they engaged us. We're fixing their life choices now."
He heard boots, breath, Wen cursing, then Aria again.
"Spotters down. Beacon rig has anti-tamper. Wen says cut wrong wire and we light up half the mast."
Wen came on channel, voice tight and fast.
"Need three minutes and no one shooting me."
Marcus muttered near Viktor, "No one ever shoots engineers at convenient times."
Two minutes later a distant boom rolled over the quarry.
Viktor's heart slammed.
Aria came back immediately.
"Controlled pop. Wen pulled beacon core and dumped charge into empty slope. We're alive. Returning with hardware."
Torres marked the board and exhaled for the first time in ten minutes.
"Good. Now we dig."
---
The rescue shaft started at 01:50 from a cracked maintenance tunnel fifty meters east of the collapse.
Marcus led tool teams with miner discipline and soldier profanity.
"Short swings! Brace after every cut! Check dust flow!"
Wen rigged a borrowed drill motor to battery packs and prayed the old bearings held.
Kira, one arm in sling, handled air-flow modeling with charcoal equations on concrete.
"If we punch here," she said, tapping a sketch, "we vent stale gas out and fresh in without collapsing central pocket. Maybe."
"Maybe is what we get tonight," Torres said.
Tamsin sat under guard nearby, hands tied, repeating her brother's name like a broken metronome.
Lyra watched all of it from shadow.
When no one was looking she moved beside Viktor and spoke low.
"They'll offer to trade my testimony for those people in the tunnel."
"Probably."
"Don't do it."
He looked at her.
"You barely know us."
Lyra's mouth twitched in something that wasn't a smile.
"I know systems. If they win once with that trade, they'll keep burying people until you hand over everyone."
She looked toward the drilling teams.
"Save them with stone and blood, not with me."
Then she walked away before he could answer.
---
At 02:22, the first breakthrough attempt failed.
The drill bit hit hidden rebar, snapped, and ricocheted into a brace plank. One worker took splinters in the cheek. Another almost lost fingers.
Marcus shut the line down, restructured crews, and switched to hand augers.
"Slower," he said. "Safer."
"We don't have slower," Torres snapped.
Marcus rounded on him. "We have dead if you rush this. Pick one."
Torres shut up and started carrying rubble.
At 02:47, Aria returned from mast seven with mud on her boots and a cut above her eye.
"Beacon's dead for now," she reported. "But I found a second cable trunk heading north. They were planning redundancy." She tossed a cracked optic module to Wen. "Can you repurpose this as inward scanner?"
Wen turned it over, already thinking. "Maybe. Give me ten."
Aria didn't wait for further orders.
She grabbed a shovel and joined the rescue line.
Torres looked at Viktor and raised an eyebrow.
"Your point scout is digging now."
"My point scout makes her own chain of command when people are buried," Viktor said.
Torres gave a tired, reluctant nod.
"Fair."
---
At 03:11, Wen's repurposed optic module gave them the first image from inside the pocket.
The screen showed dust, darkness, then Emma's face lit by a weak lamp, pale and streaked gray.
Cheers broke out across the tunnel mouth.
Emma didn't smile.
"Less cheering, more oxygen," she said through static.
"How many still breathing?" Viktor asked.
"Forty-one." Her eyes flicked down. "One didn't make it."
"We're close."
"Define close."
Kira checked depth marks. "Eight meters rock and one compromised beam."
Emma swore softly. "Then stop talking to me and start cutting."
They cut.
At 03:39, a palm-sized vent opened and stale air rushed out like an exhale from underground lungs. Fresh air pushed in through hose lines.
Inside the pocket, children coughed and laughed at the same time.
At 03:52, they widened the breach enough for first extraction: two smallest kids, then one elderly man, then the crush patient stabilized with splints and tape.
Emma came out fourth, face gray, hands black with blood that wasn't all hers.
She stumbled once. Viktor caught her elbow.
"You okay?"
"No," she said. "Functional."
She pointed back through breach. "Keep line moving."
They did.
---
Last out was a body none of them expected.
Male. Mid-thirties. Civilian coveralls over tactical underlayer. Council security pass sewn into inner seam. Neck broken, probably from initial collapse. One hand still clutched a satellite hand-unit with a hardened transmitter core.
Wen pried the unit loose and plugged into his tablet.
"It was live until twenty minutes ago," he said. "Auto-burst every sixty seconds."
Torres stared.
"From *inside* Emma's trapped pocket?"
"Yep."
Emma sat on a crate, breathing through a mask, and looked at the corpse with flat disbelief.
"He wasn't with us when we entered the tunnel," she said. "I would've noticed."
Aria crouched beside the body, pulled back the sleeve, and revealed a faded tattoo under grime.
A diamond cut by a vertical line.
Kira whispered first.
"Danner's private recovery mark."
They brought Tamsin in under guard and dropped the corpse at her feet.
She recoiled so hard she fell backward.
"I don't know him," she said before anyone asked.
Aria crouched until they were eye-level. "Try again."
"I swear. I don't know him. My contact was voice-only. Dead drops. Code name Uncle Vale." Tears cut clean lines through dust on her cheeks. "I planted charge points and beacon because they had my brother. That's all."
Torres glanced at Viktor. "Uncle Vale doesn't match known Council callsigns."
"Could be broker cover," Kira said. "Could be Harrow relay."
Marcus pointed at the dead operative's boots. "Dust only on toes. He didn't walk far. Entered near pocket."
"Guide access routes," Torres said.
Viktor called roll for all personnel with maintenance-clear codes.
Twenty-one assigned.
Nineteen present.
One unconscious.
One missing.
Nadia Fell.
Aria swore quietly. "The same Nadia who warned us about Harrow."
"Also had route update access," Torres said.
"Find her," Viktor said.
Search teams fanned through bays and side drifts while dawn began to thin the dark.
At 04:21, west shelf sentries reported climbers.
Aria took two fighters and intercepted four bounty hunters with a thermal scope and bolt cutters. Three captured. One dead from a fall.
She returned with a recovered handset.
"Queue message received twenty minutes ago," she said. "Text reads: *West shelf gate opens on green blink.* No sender ID."
Wen checked logs. "Message never read. Climbers got intercepted before signal."
Torres rubbed his face. "So our leak tried to coordinate a gate opening while we were still extracting tunnel civilians."
At 04:39, Marcus found Nadia.
Not alive.
Body hidden behind scrap mesh near Bay Five drainage niche. Throat cut clean. No defensive wounds.
Emma knelt beside the body, pulse gloves still on.
"Less than an hour dead," she said. "After the collapse."
Torres searched pockets and found a folded route card. Kira held it over a lighter flame. Faint letters appeared in heat-reactive ink.
*THIRD KEY STILL ACTIVE. TRUST NO SINGLE WATCHER.*
No signature.
No timestamp.
Kira stared. "Collector-style tradecraft."
Aria snapped back. "Or someone copying his style."
"Either way," Torres said, "we've been hunting one leak while at least two channels stayed open."
Marcus stood and looked at the exhausted faces around him.
"Counterintelligence protocol now. Buddy pairs only. Mirrored checks. No one alone in maintenance corridors."
Viktor nodded. "Do it."
From north ridge, a shell landed close enough to rattle bolts from the overhead rail.
Torres glanced up. "Correction fire. They lost beacon precision, not target confidence."
Emma tied a bandage on a rescued child and didn't look up when she spoke.
"Then stop counting traitors for ten minutes and count incoming rounds."
Torres snapped back into map mode, redrawing arcs with shaking but accurate hands.
"All right. Bay Two and Four become kill pockets. Bay One goes dark except med lamps. We rotate sentries every twenty minutes to reduce single-point compromise."
Marcus started assigning names before Torres finished.
Aria checked each assignment against who had been alone in maintenance corridors during the last two hours and crossed out three names with hard strokes.
"These three don't touch gates until we verify alibis," she said.
Nobody argued.
The quarry had changed in one night from refuge to puzzle box where every unlocked door might be a knife.
Viktor looked from the tattoo to the transmitter and then to the breach where dust still floated in lamp light.
If the operative wasn't in wave one at entry, and wasn't in front of them at collapse, there was only one path left.
Someone had inserted him into the route *after* departure.
Using maintenance access known only to guide control.
Torres straightened slowly, face gone hard.
"Tamsin wasn't our only leak," he said.
He looked at Viktor and didn't blink.
"Whoever the second one is, they're still standing in this room."
