Nida is a single mother who takes care of her anti-social son who has locked himself in his room for five years. The only way to communicate with her son is to write on a piece of paper and slip it under the door. But, when outsiders start to get curious about what is going on behind the door of her son's room, a series of terrible events starts to happen.

• Sahamongkolfilm
• Sinjai Plengpanich
• Kanya Rattanapetch
• Teerapong Liaorakwong
• Khomapat Attaya
• Pongpitch Preechaborisuthikul
• Chatsoroth Thanuthipayakul
• Patipan Supsawatdichot
• Salina Rattana