Ron was once hailed as a supreme genius with a 100% clearance rate.However,a habit led to him being expelled from the detective academy and he was henceforth banned from working as a detective.Many years later,police officer Totomaru knocks on his door and asks for his help in a series of brutal murders.Only after a lot of persuasion does Ron,who has now degenerated into an unkempt loner,finally agree. A year later you join this unlikely investigator duo to solve your first mysterious cases.