The Devil Inside Plot

Maria Rossi was possessed by devil. There was no way anyone was being able to help her out. People who loved her planned to perform an exorcism on her. It was expected that the exorcism will free Maria from the possession of the devil. But it turns out to be disastrous, as she killed three people while that exorcism was going on. After this she was transported to Rome, where she was kept in a psychiatric hospital. Twenty years passed on. She was still there-possessed! Her daughter, Isabella was not a kid anymore. She was a grown up now, who decides to free her mother from the possession of devil. For this sake, she requests some professionals to do that for her. But once again the exorcism goes terribly wrong.