Forced into the eerie, Victorian-era Blackwood Apartments, Willow discovers her new home is a sentient deathtrap with a bizarre set of rules for survival. Tapping at her fourth-floor window is the least of her worries. A shapeshifting elevator, a clown with an axe, and hallways that rearrange themselves are just the beginning. To stay alive, she must master the building's deadly game, where breaking a rule means becoming another ghost in the walls, and survival means sacrificing a piece of her own humanity.