Set within a small detective agency located by along the riverside of Sumida River in Asakusa District, Tokyo. At the detective agency, there are 3 employees. Researcher Muraki (Joe Odagiri), the head of the detective agency and reception clerk Megumi who has bright a personality. They receive requests that even they think is nearly impossible to perform, but they try to find a solution by carefully approaching their clients, the people around their clients and whatever is hidden in the background.