Bizarre

An empty glass on the windowsill. A letter without a signature. These are the only clues left in the apartment after the tenant vanishes. A young clerk, drawn into the investigation, discovers the building has no thirteenth floor—yet people keep disappearing there. His search leads him through shifting corridors and into a silent, moss-covered courtyard that shouldn't exist. This 1970 fantasy horror film builds a chilling reality where architecture itself holds a malevolent secret, and the most ordinary doorways can become traps.