Key to 212 (Indestructible Fractal Shadows - IFS, #12)

Nevada desert, 1975.
The Desert Star Motel hums quietly along I-15, a place for travelers passing through and stories that don't stay long.

Then a man checks into Room 212.

No luggage. No history. Just a key clutched too tightly and a request for a shower. Twenty minutes later, he's gone. No footprints. No exit. Only steam curling on the mirror and a single word left behind:

thanks

The room returns to normal.

Until it doesn't.

Guests begin to pass through 212 without noticing anything wrong. They ...