Kyoichi Kagenuma, the Nightmare Detective is a man cursed with the ability to enter someone else’s dreams. Yukie, a 15 year old high-school student is plagued by nightmares about a classmate and approaches Kagenuma to ask him to enter her mind and cure her of her bad dreams. Kyoichi tells her that it is too risky to enter someone’s dreams and that he has quit being a Nightmare Detective. But Yukie insists that she will die if she goes to sleep, and will not leave his side. She refuses to listen to Kyoichi and begins to explain what happened to cause her nightmares...