Marie, 56, returns home. As she steps through the door of her apartment, a sense of unease washes over her. The door is slightly ajar, and music is drifting out. As she moves further inside, strange details trigger a growing sense of anxiety. She begins to wonder — is her mind playing tricks on her, or has someone really entered her home? Fear gradually takes hold, leading her to doubt her own perception of reality.

Two fathers struggle to find a way to cohabit with their possessed daughter. Every night, the same thing happens over and over. Giles and Sean's daughter runs around their flat, screaming, scratching walls - possessed by a demon. They're terrified of their own daughter and don't know what to do about it.