You slam your device into the coolant line, and icy vapor hisses against your face. The screen spasms, then goes dark as the overheating systems finally surrender. Your satchel shifts on your chest, and the duct hum deepens as power reroutes somewhere deeper. A new sound joins the silence, a soft mechanical click like a lock deciding to open. Through the grating ahead, a red emergency light steadies, revealing a narrow service ladder descending.

You grab the ladder rungs and drop carefully, metal biting your gloves as the ventilation duct narrows into a maintenance throat. The patrol footsteps below remain distant, but the building feels alerted now, not by the alarm, but by something worse waking up. Cold air pours in from vents that shouldn’t exist, smelling faintly of ozone and burnt plastic. The ladder ends at a grated floor, and beyond it a corridor glows with shifting blue gridlines. The endless city presses on outside, yet here the walls seem to watch your every breath.