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Takemiya Union Tōjō-gumi Wakagashira Yasuda (Kazumi Matsuda) retaliates against the Kansai-based Myōjin-kai by attacking their office after an assassination attempt on Union chairman Shimamura (Shunsuke Kariya). Joined by Yamashina-gumi Wakagashira Kiryu (Yoshiyuki Yamaguchi), the two succeed and pledge to work as brothers without an official oath, dedicating themselves to their organizations and the Union. The Union faces upheaval with Shimamura's retirement announcement and the loss of his son, Katsuto (Hitoshi Ozawa). The leadership race narrows to Tōjō (Hiroyuki Watanabe), Yasuda's boss, and Yamashina (Masahiro Noguchi), Kiryu's boss. Just as Yasuda’s casino operation thrives, a police raid confiscates all earnings and forces its closure. In desperation, Yasuda turns to a certain man (Naoto Takenaka) for help.