On the day of his scheduled execution, a convicted serial killer gets a psychiatric evaluation during which he claims he is a demon, and further claims that before their time is over, the psychiatrist will commit three murders of his own.

Released from prison for a crime she didn't commit, Diana tries to prove her innocence by tracking down her ex-husband, Elias, who framed her for fraud. However, she soon uncovers a much more nefarious plot that involves a mysterious disappearance.

At the edge of postpartum psychosis, a new mother Harper moves in with her own mother to their family's rural farmhouse. Soon she finds herself hunted by a threatening monster who has designs on her child.