The Shimazu Clan of South Osaka, a longstanding yakuza group, built its foundation in the port cargo handling industry and maintained its independence as a traditional gambling syndicate. Tetsuo Sakuragi (Yasukaze Motomiya) formed a brotherly bond with Kenichi Kanamori (Yoshiyuki Yamaguchi) while in prison and, upon release, began serving as an executive for the Shimazu Clan. However, after two police raids disrupted their gambling operations, Sakuragi interrogates a regular customer, Hirata, and uncovers that it was orchestrated by the Koga Family. Sakuragi and Kanamori confront Tatsumi (Takashi Shigematsu) at his office, who had been manipulating Hirata, but Kanamori is shot by a Koga Family member. The long-standing cold war between the Shimazu Clan and the Koga Family erupts into full-blown conflict...!!

사쿠라기 테츠오는 교도소 안에서 만난 시마즈파 카나모리 켄이치와 술잔을 나누고 출소한 후에 시마즈파의 간부로 일하고 있었다. 그러나 도박장에 두 번이나 경찰이 찾아오자 사쿠라기는 단골 히라타를 추궁한다. 그 결과, 코가 일가의 짓이라는 걸 알게 된다.