To celebrate his 30th acting anniversary, Kōji Matoba stars as Seiji Oda, the fiercest member of Tendokai, who joins the organization under Kazuma Washio (Hitoshi Ozawa). In 2011, Tendokai dominates Kanto, while the rising Santōkai threatens them. Meanwhile, in Yokohama, Seiji Oda forms a rogue group, Oda Dōshi-kai, and violently protects his turf, clashing with Jinseikai. As Tendokai's Vice-Head Ryuji Kondo retires, Keiji Oda (Seiji's brother) is tasked with calming the tensions between the two groups, leading to a reunion between the Oda brothers.

After driving back the Kanto-based Tojin Alliance, the Osaka hangure group Battle Family, led by Kenji Tsukino (Ryohei Abe), stands victorious. Yet the powerful Kanto Sanrenwakai, which controls the Tojin Alliance, continues to seek revenge as part of its planned expansion into Kansai. One night, Battle Family members are drinking at their usual hangout—a bar owned by Yuya (Kaname Endo)—when Kenji is confronted by an old acquaintance, gangster Fujiyoshi (Honkon). Tensions flare, and Kenji and Yuya end up beating Fujiyoshi to death. Unbeknownst to them, Fujiyoshi was a sworn brother of Hanashiro (Hitoshi Ozawa), the wakagashira of the Fujimasa-gumi, where Kugisaki belongs. To settle the score, Kugisaki summons Kenji and orders him to kill Yuya. At the same time, the Tojin Alliance begins moving into Kansai, hunting down the Battle Family. With enemies closing in from all sides, a new and deadly conflict begins.

Ren Hoshizaki (Takahiro Kuroishi), a lone drifter, is hired by Katsuya Dojima (Daisuke Motoki), boss of the Dojima-gumi, to brutally assault Kuroda of the Tojin Alliance. Forced to lie low in Osaka, Ren takes refuge with the Fujimasa-gumi. Through Kugisaki (Yoshiyuki Yamaguchi), he is introduced to the “Battle Family,” led by Kenji Tsukino (Ryohei Abe). However, Ren openly declares that he refuses to work under anyone weaker than himself and challenges Kenji to a fight. Despite his undefeated record, Ren is defeated instantly by the larger Kenji. From that day on, Ren begins working under the Battle Family—but his path is far from simple…