Loki, the Norse god of mischief, has been exiled to the human world after what seemed to be a bad joke. As part of his punishment, he must take the form of a child. The only way to return to the realm of the gods is to collect auras of evil that have taken over human hearts, so he opens a detective agency to pursue them. He is soon joined by a human girl named Mayura, an obsessive mystery‑solver who aids him in her own way. Soon other Norse gods appear, most of whom intend to assassinate Loki for reasons that remain unclear.