Two rival gangs of gangsters clash for dominance of a neighborhood.
Kinshiro takes over the family, but he thinks he is going to replace the son of his stepmother but runs into trouble when he befriends the yakuza.
Kota and Kosuke, from the Hikyaku-ya shop in Edo, went to Kyoto. Contrary to their carefree appearance, they carry a secret letter concerning the Aoba clan from Kyoto. A samurai who calls himself Okuma Danemon joins them on their journey, and soon people begin to appear one after another, seeking to get a secret letter...
