Kyosuke Fushimi is a former detective from Kanagawa Prefectural Police First Division who currently works as a special agent of KSBC (Kanagawa Prefectural Police Investigation and Analysis Centre). He uses his genius brain and knowledge of past crimes to solve difficult cases. Kyosuke also make use KSBC's latest investigation ability to find the serial killer who murdered his lover. Other members of the organization include an expert profiler who was once a university criminology professor, a single mother formerly with the Self-Defence Forces and a young genius hacker. They seem like a dream team, but each is a criminal harboring a dark past.