# Chapter 173: Choir of Sirens
The click under the floor became a low mechanical hum.
Not one device.
A chain.
Ash hit the nave at full speed and saw the crowd folding in on itself around a stalled cot lane.
Civilians were trying to move west, volunteers were trying to keep them in rows, and every shouted challenge phrase made the panic worse because half the people could not hear over generator fans and screaming children.
Elena vaulted a pew and landed beside him.
"White veil, south aisle," she snapped.
Alina pointed to the choir rail.
"Clapping source there."
A man in plain work clothes stood on a bench near the rail, clapping slow and steady.
One clap.
Pause.
Two claps.
Pause.
Three claps.
Then repeat.
People near him turned their heads as if the rhythm meant safety.
Ash recognized the pattern from Chen's old notes.
Crowd steering cadence.
Bell Spine had used it in famine-line riots years ago.
"Take the clapper alive," Ash said.
Elena was already moving.
Ash and Alina cut through cots toward south aisle. A white veil flashed between two support columns, then ducked into a side passage lined with donation crates.
Ash hit comms.
"Sister Amel heading south passage. Lock all side doors now."
Tiago answered through coughing breaths.
"Trying. Half these doors were repaired by volunteers with kitchen hinges."
Jin cut in, voice tight.
"Basement chain just split signals. Main hum under nave dropped. New spike under west exit tunnel."
"Meaning?" Ash shouted.
"Meaning they can trigger different segments separately."
Perfect.
Multiple traps.
Multiple distractions.
Exactly what Bell Spine wanted.
Ash reached the passage mouth and nearly slammed into a rolling supply cart coming the other way.
A teenager pushed it with both hands, crying.
"She said move this to triage!"
On the cart sat two oxygen canisters and a stack of blankets.
Alina's hand shot out and stopped the cart by the handle.
"No one told you that," she said.
She stripped the top blanket and exposed wiring taped under the second cylinder.
Timer read 00:00:41.
The boy made a sound like he would throw up.
Ash shoved him behind a stone pillar.
"Stay down."
Alina dropped to one knee and sliced tape.
"Remote trigger with fail timer."
"Can you kill it?"
"If the line isn't mirrored." She clipped a yellow wire. Timer froze at 00:00:17, then restarted at 00:00:15.
"Mirrored," she said.
She ripped the battery pack free, threw it against the wall, and slammed her knife through the module.
Timer died.
No blast.
For now.
"One canister rigged," Alina said. "The other might be real oxygen. Might be another bomb."
Ash keyed Jin.
"How many moving pings now?"
"Three. One in west tunnel. One by north transept. One..." Keys clattered. "One just appeared in upper gallery above nave crowd."
Elena's voice exploded across channel.
"Clapper is down. Not Bell Spine regular. Solar volunteer band, forged papers. Neck tattoo covered with burn paste." She dragged breath. "He had a deadman switch in his palm. I cut his thumb tendon before he could press."
"Alive?"
"Barely."
"Keep him breathing."
---
Solomon took the hand mic again while chaos built behind his calm.
"West hall only," he told civilians. "Do not run. If you hear clapping, ignore it. Follow blue-arm volunteers."
A mother with two children grabbed his sleeve.
"Is there a bomb?"
He met her eyes.
"There is danger. There is also a path out. Walk with me."
She did.
Half the row followed because she did.
Ash saw it and filed the fact away like ammo.
Influence was a weapon whether it came from fear or trust.
Pilar ran command from the choir step with three paper boards and a marker clenched in her teeth.
"Row groups A through D to west hall. Group E hold. Group F reroute through baptistry corridor," she barked. "No one moves without a visible witness tag."
Noa burst in from side door, hair soaked with sweat, Ines on her shoulder with a med pouch and a bolt cutter.
"We brought the Alcantara burst modules," Noa said.
"Can you jam local triggers?" Ash asked.
"Maybe. If signal family matches."
"Then maybe is enough."
Noa and Chen went to work over comm, matching frequencies between captured modules and live pings. They had no proper lab.
They used a church folding table, a battery inverter, and a chipped radio from a fishing trawler.
At 14:01, Noa shouted.
"Got handshake! Not full kill, but we can desync trigger chain every twelve seconds."
Jin confirmed.
"West tunnel ping now stuttering. Good hit."
"How long can you hold?" Ash asked.
Noa looked at the inverter like it had personally insulted her.
"Until this battery melts or my hands do."
"Hold."
---
Ash and Alina took west tunnel first.
The passage smelled like diesel and wet stone. Water dripped from old pipes. At the third arch they found device four tucked behind stacked cots, wired to a steel support brace.
Not enough explosive to level the basilica.
Enough to drop the exit lane and trap everyone in west hall.
Alina frowned.
"This one is shaped for collapse, not shrapnel."
"Bottleneck kill," Ash said.
"Yes."
She knelt and began counting under her breath. Ash held flashlight steady while Jin called out stutter windows from Noa's jamming cycle.
"Window in three... two... one... now."
Alina cut one line, then another.
The hum shifted pitch.
"Again."
"Window in three..."
They repeated three times.
At the final cut the device clicked, then went silent.
Ash exhaled hard.
"One lane saved."
"Two pings left," Jin said. "Gallery and north transept."
They ran back up.
In the nave, Elena had the clapper restrained against a pillar while Haven medics kept pressure on his bleeding hand. He laughed through clenched teeth when Ash knelt in front of him.
"You're late," he said.
"Where's Cantor?" Ash asked.
The man spat blood near Ash's boot.
"Everywhere you sign your name."
Elena slapped him once, sharp.
"Answer real."
He smiled with broken lips.
"You want real? Your people think Cantor is a person. Cantor is a choir."
Before Elena could hit him again, he bit down.
Alina jammed fingers into his jaw, but too late.
Capsule cracked.
Foam bubbled at his mouth.
Medics worked him anyway.
He died in thirty seconds, still smiling.
No neat confession.
No map.
Just one more dead courier built to burn information on exit.
Ash stood.
"We keep moving."
---
The gallery ping turned out to be crueler than a bomb.
A satchel wired with a loudspeaker and a blank firing cap.
No explosive charge at all.
Just programmed blast sounds and prerecorded screams to trigger panic in packed shelter rows.
Noa cursed when she opened it.
"Psych weapon."
Pilar scanned the satchel contents.
"And this note says to trigger at 14:10 when west lane seals."
Ash looked toward west corridor where families still moved in controlled lines because Solomon's volunteers and Tiago's dock teams kept shouting clear steps.
If they had panicked at 14:10, the fake blast might have killed more than any real charge.
"Keep the satchel," Ash said. "I want every camera to see this thing tonight."
Last ping remained at north transept.
Alina reached storage first, checked the fake-timer cylinder they had left under guard, and frowned.
"It moved three centimeters."
Guard swore.
"No one touched it."
Alina squatted, eyes tracing floor tiles.
"Cylinder is not device. It's anchor." She looked up at Ash. "Real charge is below tile. Pressure linked."
Of course.
Ash called for a floor map.
No map existed.
The basilica had been patched too many times.
So Ines did what Ines always did.
She got on her knees with a crowbar and started tapping tiles for hollow sound while everyone else covered lanes and moved civilians farther west.
Tap.
Tap.
Tap.
Thunk.
"Here," she said.
They pried up the cracked square and found a canister buried in old sand, wired to the fake cylinder stand above.
Timer hidden face-down.
02:06 remaining.
Alina cursed in three languages and started cutting.
Chen guided from comm with clipped instructions.
"Do not remove full harness. Brown pair first, then clip bridge line at connector C. If connector C sparks, stop and re-seat."
Noa's jammer stuttered.
"I just lost clean handshake!"
Jin shouted.
"Cycle drifted. You're off by half a second."
"Then fix it!"
"Working!"
Ash held pressure on the anchor post while Alina cut the brown pair.
No spark.
Timer dropped to 01:31.
"Bridge line," Alina said.
Her hand did not shake.
Ash's did.
She clipped connector C.
A tiny spark jumped.
Everyone froze.
Timer dropped faster for three beats, then stabilized at 01:17.
"Re-seat," Chen snapped.
Alina pinched the connector, pushed, twisted.
Click.
Timer froze.
Then cleared.
No hum.
No blast.
No collapse.
Ash sat back on his heels, sweat running into his eyes.
"Status," he said.
Pilar answered from above.
"Civilians clear from immediate zone. West hall at ninety percent capacity. No mass casualty event."
Solomon added, voice cracking for the first time all day.
"Blessed be the stubborn."
Tiago laughed like he might cry.
"That's us, I guess."
---
By 15:40, the basilica was secure enough for breathing room.
Secure enough, not safe.
They found two more fake devices and one poisoned water jug near triage that would have sickened hundreds by nightfall.
The red-thread sweep caught four infiltrators alive, three dead by suicide capsule, and one child courier who had no idea what was in his bag.
Ash ordered the child fed and kept with med staff, no interrogation until guardian witness was present.
Solomon backed him in public, which mattered.
At 16:10 they held the planned broadcast anyway.
Tiago on one side.
Solomon on the other.
Pilar in the middle with evidence table.
On camera they showed fake witness sheets, forged seals, panic-satchel, and the canister harness recovered from under the transept.
Tiago spoke first.
"If you hear any order without live challenge phrase and blood witness, treat it as hostile. I don't care whose face is on screen."
Solomon followed.
"Sanctuary remains open. We will not close doors because liars fear open eyes."
View counts spiked across district boards.
More important, shelter panic dropped over the next hour.
People had clear instructions again.
Clear instructions kept crowds from turning into stampedes.
At 17:02, Lin sent a single-line message:
**Azure medical lane expanded to two additional ferries for twelve-hour period. Do not squander this.**
Elena read it and nodded once.
"She watched the broadcast."
"Good," Ash said.
---
Evening brought a new map and a worse problem.
From packet three, Chen isolated the St. Agnes Convoy route tied to Mara.
Supposedly medical traffic.
Actually a mixed convoy of relief trucks, one armored bus, and a river barge transfer window set for 21:30 toward Marseille outer quays.
"She is moving under sanctuary cover while everyone watches basilica drama," Elena said.
"We intercept outside shelter lanes," Ash said. "No firefight near civilian queues."
Moreau patched in from Marseille command.
"I can set a legal stop at quarry road checkpoint with mixed witnesses and two neutral cameras. If convoy runs, we track to outer quay and box there."
Noa volunteered before anyone asked.
"I'll go with the stop team. If they dumped new burst modules into convoy, I want eyes on every crate."
Ines chimed in.
"I'm going too. We owe Mara a receipt."
Ash considered, then nodded.
"Approved. Elena leads intercept. Alina stays with basilica security until shelter shift completes."
Alina did not like it.
"You need me on intercept."
"I need no second basilica trap while we're chasing Mara," Ash said.
She held his gaze.
Then nodded once.
"Fine."
Marcus checked in from Haven.
"Shelters stable. I can send one fast squad to Marseille support by midnight."
"Send them," Ash said. "Keep your school rings staffed first."
"Always."
---
Night dropped hard over Lisbon.
Generator lights made the basilica look like a shipwreck that refused to sink.
Children slept on borrowed mats in the west hall while volunteers walked aisle checks every ten minutes and read challenge phrases softly so no one woke in panic.
Ash finally stepped outside for thirty seconds of cold air.
His shirt stank of dust, wire insulation, and old smoke.
Elena came out beside him, checking the convoy route map one more time.
"You think Mara will be in that convoy?" she asked.
"I think she wants us to think she is."
"Same." Elena folded the map. "Still have to hit it."
"I know."
From inside the basilica, a child started crying, then quieted when someone hummed a lullaby off-key.
Ash looked back through the broken doorway.
Under yellow light, a volunteer had hung one recovered red thread on a nail above the evidence table like a warning charm.
It swayed in the draft beside a blood-wet rosary and smelled faintly of explosive dust.
