On Octobre 30, 1989, Maria Rossi (Suzan Crowley) committed a triple murder during an exorcism performed on her. The Catholic Church became involved, and she has since been in a Catholic psychiatric hospital in Rome. The film shows a news story and police investigation showing the three members of the clergy whom she murdered. Her daughter, Isabella, learned of the murders from her father, who died three days after telling her.
Twenty years later, Isabella (Fernanda Andrade) is in the process of filming a documentary about exorcisms, and to find out more about her mother, she visits a school in Rome. She meets two priests, Ben (Simon Quarterman) and David (Evan Helmuth). Ben and David take Isabella with them on an exorcism performed on Rosalita (Bonnie Morgan). They bring along medical equipment to determine if it's possession or mental illness. Rosalita attacks the crew after spouting out obscene remarks in different languages and accents. She calls Isabella by her name, despite not knowing her. Eventually, they get her under control.
When Isabella goes to visit her mother, Maria, in the asylum, she finds that her mother also speaks in different accents and has paintings all over the walls. She has inverted crosses carved into her arms and her bottom lip. Maria tells Isabella that killing a child is against God's will, then lets out an ear-shattering scream. Isabella tells David and Ben that she had an abortion years ago and her mother had no way of knowing that--another sign that showed possible possession.
After analyzing the data from the video and audio files, they present the evidence to the Church. David shows many signs of stress, as Ben plays the audio files over and over, listening to the part where Maria says "I know what you did." Ben then finds that there are four different demons speaking in unison in a different clip.
The international cast includes Fernanda Andrade as Isabela Torelli, Simon Quarterman as Ben, Evan Helmuth as David, Suzan Crowley as Maria, Ionut Grama and at Bonnie Morgan II.
Devil Inside is a Paramount Pictures Presentation directed by Brent Bell and is distributed locally by United International Pictures through Solar Entertainment Corporation.
This film will open in Philippine cinemas starting February 29, 2012. Devil Inside is now on its second week in cinemas.