在东京下町经营着侦探事务所父亲去世了，其长女专职主妇的田中小百合（稻森泉），卡车司机大哥田中一郎（阵内孝则），时隔10年一个儿子田中太郎（神木隆之介）一起回家，继承了田中侦探事务所，同时解决各种各样的事件，骚动的喜剧电视剧。

An old saying has it that it takes the first generation to create the business and the second one to destroy it. When the Tanaka Family's father, a career private eye, passes away, eldest daughter and mother figure Sayuri has to decide whether or not to continue the family detective business. Seeing no hope or interest on the part of her other younger siblings to carry on the business, she is about to shut it down when her long-lost elder brother, Ichiro, returns. A down-on-his-luck truck-driving single father now, he decides to take the mantle and continue the family tradition-his only experience being that he played cops and robbers as a kid. In his new capacity of "president" of the family business, he conveniently decides to move into the home that he left many years before. Will the Tanaka Clan really be able to resurrect the business together? Or does elder brother Ichiro have some other plans for the business?