After escaping a kidnapping, Meg travels with her husband, Scott, to his family’s isolated compound in Cape Cod. When they arrive, they discover they are not alone on the property. Scott’s odd aristocratic cousin, Madelin, is staying next door. Soon, Madelin’s presence is inescapable and Meg and Scott’s already fragile relationship begins to fracture. All the while, Meg is haunted by vivid nightmares, visions of an old woman in the woods, and a growing suspicion that Scott is hiding something.