After serving his sentence, Yakuza family member Toshin-gumi Umebayashi is released from prison. Toshin-gumi was already headed by the boss in the second generation of Shotaro, but Shotaro fell into a trap, he is manipulated by his sworn enemy Kanzaki-gumi. Kanzaki-gumi captures the Toshin-gumi oil fields mined by the first boss. Umebayashi explodes in anger and attacks Kanzaki-gumi, but...