Arthur, a middle-aged man, was taken to hospital in a car accident. He said a lot of inexplicable words during the coma. The beautiful nurse Elizabeth wrote them down in a black leather notebook. After being discharged from the hospital, Arthur found that these obscure words vaguely pointed to an event buried deep in his subconscious, and in the process of excavation, a series of murders began. Unlock the dream in the dream, a murder many years ago gradually surfaced. The truth is a surprise, an unexpected film.