Stream Demon House Online Free – Watch Full Movie from Home at 123Movies. . As mass hysteria breaks-out over an alleged demonic possession in an Indiana home, referred to as a “Portal to Hell,” Ghost Adventures host and paranormal investigator Zak Bagans buys the house, sight unseen, over the phone. He and his crew then become the next victims of the most documented case of demonic possession in US history… the “house of 200 demons.