A socially awkward single man named Phil begins hearing the voice of a woman in his head. His therapist suggests he is suffering from dissociative identity disorder; however, being able to talk to the voice, Phil leaves his therapist. Over the course of a few weeks Phil and the putative woman, named Annie, strike up a friendship which turns into a relationship. Phil decides to meet up with Annie in a location halfway between his city and hers. On the way there, Annie says she was abducted and she gives Phil directions to the isolated house she is kept at and a description of her abductor. Phil arrives and pummels another man to death in front of that man's young daughter and wife, Annie. A frightened Annie claims to have never met Phil before and he is arrested at the scene. He believes his therapist was right about being insane until the voice comes back and thanks him saying that she never lied to Phil, he just believed what he wanted to, to the point of being prepared to murder, and that by killing her husband, Phil has been the "escape hatch" for her unhappy marriage. Phil starts to go mad as the police car drives off.