The owner of Takano Detective Agency, Takano Seiya, is a recognized gourmet and big eater. He is often requested by the Ogata Police Department, a college student, and helps with his secretary and assistant: Demizu Kyoko. Solve all kinds of difficult cases. But Takano has a bad habit of eating the food at the scene - whether it is evidence or not - which brings a lot of trouble to Ogata, and he has to trouble his assistant to deal with the aftermath. However, after tasting these evidences, Takano will deduce the answer to the case from some characteristics and conditions of the food.