Behind the Patch of Fallen Plaster in the Stairwell, There's a Rainforest

The stairwell stays exactly as it is—electrical box, lock-picking ads plastered everywhere, chipped handrails, sound-activated lights. Only behind the hole where the wall plaster peeled away isn't brick, it's a rainforest at night. Three or four fireflies have already flown out of the hole, hovering in mid-stairwell.