In the late 1970s, in Enfield, England, a family was terrorized by an unseen force for 18 months. Constant banging on the walls, feces smeared in rooms, levitation, voices, furniture tipping over were all a part of the terrifying experience this family had. Some think it was a hoax. Others think it was factual. It's one of the most talked about cases in history, the Enfield Poltergeist.