In 1974, Ronald DeFeo, Jr. murdered his family at their house in Amityville, New York. He claimed that he was persuaded to kill them by voices he heard in the house. One year later, married couple George (Ryan Reynolds) and Kathy Lutz (Melissa George) move into the house along with the latter's three children from a previous marriage, Billy, Michael and Chelsea. The family soon begins experiencing paranormal events in the house. Chelsea (Chloë Grace Moretz) claims that she befriended a girl named Jodie, a name belonging to one of the murdered DeFeo children. One day the couple decide to go out, and they hire a babysitter to watch the 3 kids. When the babysitter, Lisa (Rachel Nichols), arrives they come to find out that she had previously been hired to babysit the DeFeos.