The Devil Inside is a 2012 American found footage supernatural horror film directed by William Brent Bell, and written by Bell and Matthew Peterman. It is a documentary-style film about a woman who becomes involved in a series of exorcisms during her quest to determine what happened to her mother, a woman who had committed a triple murder, during an exorcism performed on her, and was sent to a mental hospital, Isabella decides to make a documentary on exorcisms.