Angela Blau has a degenerative bone disease, but she was never warned her mind could deteriorate as well. There's no other explanation for the footsteps coming from the second floor—footsteps her husband, Jack, never hears. And then there are the ghosts who attack her at night, and the townspeople who dig through the dirt like rabid animals and peer through her windows.
Maybe the ghosts and the townspeople are in her head—it wouldn't be the first time she's let her mind wander—but the noise has to be real, and she'd go up there and prove it if the stairs weren't so rotted that she'd fall right through, Jack says.
Things get worse when Arlo, a lonely old man who lives "somewhere down the street," reveals a violent crime that occurred on the second floor. Against Jack's warnings, Arlo indulges Angela's growing obsession and pushes her to discover the true source of the noise, who exactly the townspeople are, and whether a traumatic incident that occurred four months ago, an incident Angela refuses to talk about, is to blame for all of it.