Matantei Loki Ragnarok. Loki, the Norse god of chaos, was banished for what was clearly a bad joke to the human world. He's forced to take the form of a boy, as well as being exiled. He's told the only way he can get back to the gods' world is if he can gather the auras of evil that take over human souls, and so he operates a detective agency to do that. A human girl named Mayura, who is a nut for mysteries, soon joins Loki and she helps out in her own way. Soon, however, other Norse gods are beginning to appear, and for reasons unclear, most are intent on assassinating Loki.