The series follows Yusuke, a tearaway teenager who dies trying to save a young boy from being hit by a speeding car. As he looks down at his body from the afterlife, Yusuke meets a woman named Botan (Kotone Furukawa), who guides him to the spirit world. She tells Yusuke that his death was premature and unexpected, but that no one would’ve ever believed a troubled kid like him could perform such a selfless act — so there’s no place for him in heaven or hell. Yusuke is then given the opportunity to be revived after completing a trial, allowing him to be sent back to the human world to investigate demons as an Underworld Detective.