In October of the 4th year of Ansei, a ronin named Gennosuke Hiraki comes to the Iitomi Inn. He judges that he could overturn the clan's argument for reforming the domain administration by promoting human resources, and kills the castle retainer, Yamaoka Kemono. However, this was a ruse by the second in command, Yorimo Hoshino. Moreover, Hiraki is pursued by Misa Yamaoka, the daughter of the governor, and her husband, Daizaburo Torio, as well as Katori Gundayu, a master swordsman, on Hoshino's orders. With the help of Toragoro, their leader, the pursuers are looking for Hiraki in an attempt to take revenge.