In a remote part of southern China, a mysterious Westerner appears on a riverbank, completely naked. Taken to the local police station and afterwards to the hospital, he refuses to speak. While the doctors soon resign, the hospital’s orderly, Jiang, befriends the stranger. When Jiang learns that the Westerner is about to be transferred to a mental asylum, he decides to rescue him and takes him to his uncle’s village. There, he accidentally discovers a secret that provides a key to the mysterious stranger's past.