Based on Steve Deace’s 2016 novel A Nefarious Plot, Nefarious is an independent horror film released in 2023 in the United States and written and directed by Chuck Konzelman and Cary Solomon. Starring with Jordan Belfi is a psychiatrist tasked with figuring out whether Sean Patrick Flanery, a death row inmate, is lying about having demonic possession. The movie was made available on April 14, 2023.