On their rainy drive home from a haunted house tour in a small Pennsylvania town, sisters Megan and Dianne Willis come across a drenched, confused old woman walking alone in the middle of the road. The woman’s suddenly violent behavior causes Megan to lose control of the car. After surviving the crash the sisters soon discover they’re isolated on the property of Shaded Grove Mental Hospital, where abandoned spirits roam, and all is not what it seems.