Based on

Movies like Yakuza Prison 2 (2014)

Takazaki (Riki Takeuchi) was attacked by a mysterious attack. The investigation reveals that the assault is an attempt by the former anti-government organization, the Fujimura group, and that there is a traitor inside. Tachibana (Ozawa Kazuyoshi), who holds prison authority, is restrained even if he tries to fight back. However, Takazaki who is angry madly used Mari (Morishita Morishita) who has a grudge against the Fujimura group, and decided to attack the Fujimura group assault! (Google Translated)