Fifteen-year-old Emma Evans seemed like a pretty typical teenager until recently. Suddenly, Emma's life changes in an unexpected way. She starts having frightening fits. Although her parents attribute her behaviour to psychological problems, Emma senses that something much darker is hiding inside her, waiting for its time to break into the world. As Emma is getting sicker by the day her parents are desperately reaching for help and contact a priest who begins to visit Emma every day. He begins hypnosis sessions with her in order to help her relax so she can better express what is troubling her. Although he wants to reassure the family that all is well, he too is getting more and more frightened. There is something dark and terrible inside Emma that won't be hiding for much longer.