The filtration unit was settling into its evening silence. Dust motes drifted in the last cone of overhead light, catching on the scuffed concrete tiles near the utility room exit. A faint vibration still hummed through the metal casing, and a dry scent—ozone mixed with damp earth—hung low to the floor. Caught deep within the intake grate was a single, dried pigeon feather, its barbs brittle against the fine mesh. It seemed like just another piece of debris from the day’s shift, waiting for the cleanup crew to sweep it away. But near the threshold, where the concrete met the back door jamb, something had shifted. A scattering of spilled birdseed, mixed with grit and dirt, was arranged into a perfect triangle pointing outward. The pattern wasn't random; it formed a clear warning marker, like an arrow drawn in pale grain. It looked too deliberate to be accidental, a quiet notice placed there by something that remembered the routine of coming and going.
glow · tender