Kingoro Toyama, commonly known as Kin-chan, is the Kitamachi magistrate's authority who protects the peace and order of Oedo, following Yui-chan, who is a woman of the same heart, and Moroboshi, who is a good man. One day, Echigoya's five-year-old daughter, Hanako, was kidnapped by someone. Kingoro is furious when he learns that Hanako is a dog! However, he finds out that the reward is 10 ryo...!?