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.

Takeda (Mikio Osawa) and Tsurumi (Junichi Kawamoto)—who killed their own boss and Wakagashira and rampaged through rival turf—are taken into the Doryukai of the Kurohime family by Ryutaro Dojima (Yasukaze Motomiya). Meanwhile, Chifumi Iwaguma (Hidekazu Akai) of the Udagawa-gumi arrives from Osaka to meet Hozumi (Seiki Nagahara), and an oath of brotherhood is approved at an executive meeting—without Dojima’s consent. To stop Hozumi’s power play, Takeda and Tsurumi are ordered to assassinate him. Acting on his own impulses, Takeda ignores the plan and storms the ceremony alone, igniting a brutal internal war within the Kurohime family. All stake their lives and ambitions on rising through the underworld—who will have the last laugh: Hozumi, Dojima, Iwaguma… or Takeda?