The stairs should have taken them up. Joshi knew how physics worked. He'd studied architecture once - before the badge, before the fog. But now, as he climbed with Meera's fragile body in his arms, he saw the impossible stretch of stairs loop around him like an Escher nightmare.
Every step felt the same. Every breath heavier.
And behind them - a sound.
Not footsteps.
Not breathing.
A note.
Low. Pure. Vibrating through the walls and into the bone, into the blood. A kind of frequency that didn't stop at the ears. It entered.
Gokhale turned pale, clutching his head. "It's in my skull… like it's drilling into my thoughts - "
Joshi stopped. "Stop listening."
"What?"
"Don't hear it. Don't follow it. Shut it out."
Easier said than done.
The sound wasn't just there. It was inside. Shaping thoughts, unmaking reason. Memories frayed like wet paper. Joshi blinked and saw his father - dead fifteen years - standing at the top of the stairs.
"Vikrant," his father whispered, arms outstretched. "You always loved the sea…"
Joshi shut his eyes.
It's not him.
It's not him.
It's the light. It wants you to follow.
Behind him, Meera stirred.
Her voice came in a ragged whisper. "You can't escape upward. You have to go deeper first. Find the source. Silence it."
Gokhale looked like he was unraveling. "She wants us to go further down?!"
Joshi looked behind them. The staircase shimmered - stretching downward into ink.
He made a decision.
They turned and descended.
Every step was a heartbeat.
Every breath tasted like salt and smoke.
They passed carvings older than time - things with too many limbs, beings with no mouths but still screaming, languages not meant to be spoken but written in blood. The architecture shifted around them. At times it looked like stone, at others like flesh, sometimes coral - ancient, dreaming coral still pulsing with life under invisible water.
Then… they reached it.
A chamber. Vast. Circular. At its center stood an altar made of what looked like bone and rust. Hanging above it - suspended in midair - was a shard of glass the size of a man. It hummed with the same note they had heard since entering the hatch. The sound that wasn't a sound.
The source.
The heart of the fog.
Meera opened her eyes. "That's not just a signal," she rasped. "It's a conduit. Something's on the other side - and it's using this to pull itself through."
Joshi stepped toward it, dizzy. "How do we shut it down?"
Meera's voice dropped. "We don't. We sacrifice."
Suddenly, her eyes rolled back. Her body lifted off the ground - levitating, arms out, hair floating like she were submerged.
And from the walls, the fog began to pour - not as mist, but limbs. Grasping. Reaching.
Gokhale screamed. "We have to do something!"
Joshi reached for the glass.
The moment he touched it, the sound stopped.
And for the first time in days - there was silence.
But silence can be worse than noise.
Because in the void that followed… something opened its eyes.