Takakura is a former detective. He receives a request from his ex-colleague, Nogami, to examine a missing family case that occurred six years earlier. Takakura follows Saki's memory. She is the only surviving family member from the case. Meanwhile, Takakura and his wife Yasuko recently moved into a new home. Their neighbor, Nishino, has a sick wife and a young teen daughter. One day, the daughter, Mio, tells him that the man is not her father and she doesn't know him at all.