For her first day of orientation, Dr. Tristian Mackenzie makes her way to the Silverdale Psychiatric Hospital for the criminally insane, where she learns of the strange series of cases from the similarly strange Dr. Moon.

A young girl and her family go through a horrifying reality while she becomes possessed by demonic forces. Throughout the film we experience the ways a family deals with situations beyond their control and how they fight to overcome them. Only when the possession takes place does the family bond get stronger and the relationships between them get tested to their limits.