But what happened in that asylum during those two decades? Until now, no one has known. It's 1960. Norman Bates is in the State Hospital for the Criminally Insane and it's up to Dr Felix Reed to bring him out of his catatonic state. But Norman and Dr Reed have obstacles in twisted fellow patients and staff members who think of the institution as a prison rather than a place of healing. And the greatest obstacle is the building itself, once a private sanitarium, rumoured to be haunted. A wild card appears in the persona of Robert Newman, Norman's twin brother, taken away at birth after the attending doctor pronounced him brain damaged. As Robert and Norman grow to know each other, Norman senses a darkness in Robert, even deeper than that which has lurked in Norman himself. Soon, murders begin to occur and a shocking chain of events plunge us even deeper into the deranged madness inside the walls of Psycho: Sanitarium.