Theorising that the paranormal exists as a result of human belief, a group of students attempt to create a supernatural entity. The experiment goes horribly wrong. Years later, young couple Kelly (Ashley Greene) and Ben (Sebastian Stan) begin to experience a terrifying, unexplained presence in their new home. In desperation, they enlist the help of a paranormal specialist (Tom Felton), only to find the house may not be the problem. But if the apparition is haunting them, how can they possibly escape?