On the night of November 13, 1974, Ronald DeFeo, Jr. took a high-powered rifle and murdered his entire family as they slept. At his trial, DeFeo claimed that "voices" in the house commanded him to kill. This is their story.

After leaving a doctor visit with the worst news, Valerie Dreyfuss and her sister Melissa come to a stop on a lonely stretch of road. Their car is engulfed by a blinding light....12 hours later Valerie wakes to the horror that her sister is gone, nowhere to be found.