- After celebrating at a drinking party with his closest friends in Bangkok, Tun (Ananda Everingham), a photographer, and his girlfriend, Jane (Natthaweeranuch Thongmee), get into a car accident. Jane hits a girl but Tun does not allow her to get out of the car and the couple drive away, leaving the girl lying in the road.
Tun begins to discover mysterious shadows on his photographs, leading Jane to believe that the girl who they hit on the road is haunting them. Tun, who has been experiencing severe neck pains since the accident, dismisses the idea, though Tun's friends are also being haunted by this mysterious girl.
Jane begins to investigate and discovers that the girl was Natre (Achita Sikamana), a shy girl who had attended the same college as Tun. After confronting Tun, Tun admits that he and Natre were in a relationship, which Tun had kept secret from his friends. Natre threatened to commit suicide when Tun broke off the relationship.
Tun starts to be haunted by Natre's ghost so he and Jane visit Natre's mother, where they find the decaying body of Natre in her bedroom, learning that Natre had committed suicide. Back in Bangkok, Tun's friend, Tan, commits suicide, jumping from his apartment balcony. Tun discovers that his two other close friends from college have also committed suicide. Believing that they have been coerced into doing so by Natre's ghost, Tun becomes convinced that he will be next...