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When he was three, Taro Komori and his sister were kidnapped, but the kidnapper was run over and killed before the ransom could be delivered. The police eventually found Taro, but not before his sister had died. Eleven years later, Taro still has nightmares of the events surrounding the kidnapping and is haunted by a tall, featureless specter.
Now Taro searches for answers together with two unlikely companions: a brash transfer student from Tokyo who is himself haunted by the memory of a fellow student who committed suicide by jumping from the roof of the school, and the son of a man who committed suicide after being accused of being involved in the kidnapping. Unseen spirits, ghosts, and out-of-body experiences all combine in an intriguing exploration into the workings of memory and our perception of the world.