On November 13, 1974, Ronald DeFeo Jr. shot and killed six members of his own family inside 112 Ocean Avenue in Amityville, New York, then claimed the house had made him do it. Months later a newlywed couple bought the property, moved in, and lasted only 28 days before fleeing what they described as demonic activity: cold spots, slime on the walls, a presence that pushed the wife's mother down the stairs. The film follows the case through the psychics who conducted a séance in the house and traced the haunting to a supposed Native American burial ground, and through the book and film that turned the story into a national sensation and a bestseller. It then turns to two paranormal investigators who were not satisfied with the published account and dug into the timeline, the lawyer's involvement, and the inconsistencies that point to the haunting as an invented scheme built for profit. The result sits the murders, the myth, and the debunking side by side and lets the viewer weigh what actually happened at 112 Ocean Avenue against what was sold.