Blackness dropped across the hub like iron plates, cutting off sight and muttering reverberations alike. The high-pitched shriek of the breached blast-door seal grated over the dull contractions of freezing coolant lines. Niran kept his palm pressed to the override panel, feeling copper relays chatter through cold structural steel. Beside him, a gasping, ragged cough tore through the black. Boon-Nam. “Niran? What did you trip?” Kannika whispered from three paces left, her breath dragging across dry teeth. Her sleeve rustled near the conduit rack. Another cough, harsher this time, followed by a faint, desperate whimpering. “He… he’s still here. The madman…” Boon-Nam’s voice was thin, choked, barely audible above the new, insidious hiss of the ash-laden air seeping through the ruptured seal. The draft bit raw frost into his split knuckles. A blinding violet lance cut the dark as the cutting-torch discharged, its arc crackling through superheated mist. The beam slashed across the overhead municipal water lines, three handspans above Boon-Nam's crouch. A spray of scalding water burst, instantly turning to steam in the sub-zero air, coating everything with a thin, shimmering rime of ice. Chaiwat kept triggering the igniter without aiming, the core-induced delirium twisting his pupils wide. Short bursts illuminated severed pipes and billowing vapour, then died, leaving raw afterimages burned into the dark. Niran flattened his spine against the shaft ribbing. Attacking the old man would only invite darker Ledger retributions; he needed the seam closed before the grey ash dust choked their lungs. He fumbled for the comms unit on his wrist, a single, glowing amber button his only guide. “Kannika, Boon-Nam! Don’t move. Stay low. I need to get to the seal. Any of you carry… anything that makes noise?” Silence for a moment, punctuated only by Chaiwat’s guttural, delirious shouts, fragmented accusations about “sun-thieves” and “hidden warmth.” Then, a faint rustle. “My amulets,” Boon-Nam wheezed. “The brass shrine pendants.” The peddler always carried a ring of stamped brass bells in his apron. “Hurl them toward the filtration manifold,” Niran whispered. “Against the intake cage.” Another arc scorched overhead, scorching the insulation on a cable tray. “He’ll turn on him,” Kannika hissed. “That’s the point,” Niran replied, already moving, inching along the wall, his hands feeling for the familiar contours of the emergency weld kit he’d stashed near the ruptured seal. The kit was heavy, cumbersome, but it was their only chance. “He’ll hear, and he’ll go for the noise.” A rattle of thin brass skipped across the grating, clattering against the pump housing forty feet out. “Aha!” Chaiwat’s voice, a triumph of madness, boomed through the filtration hub. “The little devils! Trying to hide my sun! I see you!” Another blinding flash, but this time, it was aimed directly at the source of the sound, far away from Niran and Kannika. The blue arc struck the housing with a concussive crack, slagging the brass pieces against the melted grille in an orange shower. [KARMIC LEDGER UPDATE: ONE SOUL IN PERIL. ACTIVE INTERVENTION ATTEMPTED. MERCY CONDITION MET. REWARD PENDING. KARMIC DEBT HALTED.] Niran didn’t spare a glance at the system message. He was already at the breach, the icy wind from the ash-storm biting at his face. The air here was visibly thick with fine, grey powder. He fumbled with the weld kit, his fingers stiff with cold, his breath pluming white. He snapped open the case, pulled out the emergency patch – a thick sheet of reinforced thermalloy – and the portable induction welder. The welder hummed to life, a low, steady thrum of power, its tip glowing a dull orange. He pressed the patch against the ruptured seal, the thermalloy shrieking in protest as it met the sub-zero blast-door. The cold radiated through his gloves, a deep, bone-aching ache. Bracing his ribs against the jamb, he tracked the coil around the perimeter, tacking the alloy directly over the seam. Sparks flew, brief constellations in the pervasive gloom. The acrid smell of burning metal filled the air, mingling with the stench of ash and ozone. The bead took slowly. Ten feet away, Chaiwat kept stamping over dead copper scraps, his heels clipping the concrete as he hunted his imaginary thieves. “Hold still, you shimmering deceivers!” Chaiwat roared, his voice echoing oddly, as if through a newly opened passageway. “You can’t hide the warmth from me!” Niran finished the weld, pulling back, his arms trembling from the cold and exertion. He slapped his gloved palm against the new seal. Solid. The ash-hiss died out, leaving only the thin drone of auxiliary blowers pulling through intake scrubbers. He fumbled for his comms again. “Kannika? Boon-Nam? The seal is patched. Are you both alright?” “C-cold,” Boon-Nam chattered, his breath shaking, “but still drawing air. My brass...” “Forget the brass,” Kannika snapped, her knuckles knocking against a pipe as she sat up. “Stay on the floor.” Then, a new sound cut through the silence. A heavy, resonant clang, like a massive bell. It wasn’t the distant creak of contracting metal or the whine of ventilation. This was the unmistakable sound of heavy steel on heavy steel, closing with an irreversible finality. It shuddered through the floorplates like dropping a counterweight. “What was that?” Kannika’s whisper was laced with renewed dread. Niran knew every hydraulic dog on that level: the central Core Room seal had just locked from the inside. Chaiwat, led by his frantic delusions, had sealed himself directly into the furnace chamber.

Ghost Chimes in the Dark