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.

Based on the book " A nefarious plot" written by Steve Deace. Originally released as a motion picture in 2023. Bonus features: The making of Nefarious ; Filmmaker commentary with directors Cary Solomon & Chuck Konzelman and producer Chris Jones ; Cast commentary with Sean Patrick Flanery and Jordan Belfi ; Interview with an exorcist with Father Carlos Martins ; Speak of the devil: demonic manifestations and attacks in making the film ; Nefarious Easter eggs.