Newlyweds Molly and Tim move into Molly's deceased father's house in the countryside. An ex-addict with a deeply troubled past, Molly is strong in her new life of recovery. Unexplained disturbances in the night unnerve the couple, and when her husband goes away for business, Molly is left in a house that holds many painful memories. Her isolation is soon shattered by a malicious presence that unleashes a physical and mental assault. As she struggles to regain footing in her simple existence, Molly's grip on reality begins to waver. Her erratic behaviour is a warning sign to her friends and family, whose interventions drive her further into solitary torment and spur a deep, dark infidelity within her.