At the end of the curtain, Japan was faced with the invasion of foreign powers, while the domestic situation was turbulent. The representative of the "Nanji faction" who has just won in the selection of the next general, Jing Yizhi (Konshiro Matsumoto), entered the shogunate and held the post of elder, and soon set off the "security prison" to crack down on the hostile "Yiqiao faction" leaders and subordinate warriors. The 32 detached warriors headed by Mito ronin (Fujisuke Fujisuke) gathered Edo to plot to assassinate the elder Jingyi. However, Jingyi did not climb the city as expected, and the first operation failed. The deputy leader, Qijiro Tian (Yoshiro Inaba), suspected that someone had leaked information inside. After investigation by the two leaders, they finally focused on Shinahe, the ronin of Meizhou (Mifune Toshiro) and Rongsuke Kurihara (Kobayashi Kobayashi), the ronin of Shangzhou. They all have an inextricable relationship with Jingyi.