In 2014, a demon possession story out of Gary, Indiana caused a worldwide media sensation. It included claims that a boy had walked backwards up a hospital emergency room wall, and that a priest had performed multiple exorcisms. Famous paranormal investigator Zak Bagans was producing an episode of his popular television series when the story broke; he then bought the location of the haunting a day later over the phone, sight unseen. This was it! Thought Zak, the Host and Creator of Ghost Adventures on Travel Channel, who has investigated over 1,000 hauntings. The mega-story I've always wanted to investigate. It was the next Amityville. But Zak and his crew were unprepared for what awaited them at a house that was possessed by 200 demons. Zak suffered from a debilitating illness, crew members quit and were fired, people nearly died... Zak even started to wonder if just viewing the film could open audiences up to possession themselves - had he made a movie too dangerous to release?