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 Begans was producing an episode of his popular television series when the story broke. But Zak and his crew were unprepared for what awaited them at a house that was possessed by 200 demons.