OLD is a psychological horror movie. A troubled married couple travels to an island resort with their two young children. The hotel manager offers them and several other people a chance to frolic at a beautiful, isolated beach. They can phone the hotel if they want to return before the driver picks them up at 5 p.m. However, when a young woman’s body washes up on the lagoon leading to the beach, they discover their phones can’t get a signal. They also discover the beach is mysteriously aging them. And, if they try to leave, they just lose consciousness.