Shinjuku has descended into chaos. Former Hanayuki family members Ryushin Takeda (Mikio Osawa) and Daisuke Tsurumi (Junichi Kawamoto) murdered their own boss and wakagashira, then began recklessly invading other territories. After their casino is hit, Hozumi (Seiki Nagahara), head of the Hozumi group under the Kurohime family, moves to retaliate—but the conflict is settled when Ryutaro Dojima (Yasukaze Motomiya), head of the Doryukai and Kurohime family Wakagashira aide, takes responsibility for the fallout. Intrigued by Takeda and Tsurumi, Dojima has them share sake cups and brings them into his family.
At the same time, Chifumi Iwaguma (Hidekazu Akai), head of the Iwaguma group under Japan’s largest syndicate, the Udagawa-gumi, visits Hozumi and proposes a brotherhood pact. As everyone schemes to rise to the top, a new era of yakuza conflict begins.
