In the Hudson Valley of Upstate New York, Marie is a single mother who struggles to care for her three children, particularly Julie, whose birth defect prevents her from walking or talking. For the three years she has lived in her current house, Julie has interacted with invisible friends. Marie assumes they are angels. Eventually she meets a man whose company she enjoys and she invites him to her home to meet the children. His name is Chris and he has an ability to sense spirits. He senses something is wrong the moment he steps in the house. Soon, the family sees the ghost of a blonde boy. Chris and Marie try to learn about him and the other spirits in the house through a Ouija board, which proves to be a disastrous mistake. Later, a demonologist is the only person who can give the family answers when Julie shows signs of demonic possession.