The Visit 2015

Two children are sent to their grandparents house to spend a week with their grandparents while their single mom goes on a relaxing vacation with her boyfriend. One of the kids, Becca, decides to film a documentary about her grandparents in order to help her mom reconnect with her parents and also find out some things about her parents as well. While filming the documentary, however, Becca and her little brother, Tyler, discover a dark secret about their grandparents.