The plot focuses on the character of Kazuki who lost his parents in an accident. After graduating from the police academy he was recruited by the non-governmental organization Igrasil which solves murders the police deem are impossible to explain due to lack of evidence. Kazuki’s partners in the organization include the crazy and funny Ishikawa siblings; Kaoru Moriyama, the daughter of a millionaire and the founder of the whole organization; and Suzumi, the head of the organization who is responsible for making all the major decisions.