Fact1: drowned bodies are related to recent gang war and power struggle at huge Sanno-kai crime syndicate, Fact2: huge Sanno-kai crime syndicate covers large portion of eastern Japan, Fact3: new Grand Yakuza leader of Sanno-kai reform standing with powerful rival Hanabishi-kai of western Japan, Fact4: Otomo is serving time after falling out of favor with Sekiuchi, Fact5: ruthless campaign to dismantle new Sanno-kai leadership including Kato is carried out efficiently
Output: The film begins with two anticorruption detectives observing the discovery of dead bodies in a car being recovered from the bottom of a harbor. The detectives suspect that the drowned bodies are related to the recent gang war and power struggle at the huge Sannokai crime syndicate, which covers a large portion of eastern Japan. The new Grand Yakuza leader of Sannokai, Kato Tomokazu Miura, must now reform his standing with the powerful rival Hanabishikai of western Japan. Otomo Beat Takeshi, a former Yakuza, is serving time in a maximum security prison after falling out of favor with Sekiuchi, the former Grand Yakuza before Kato murdered him and took control. When it is finally ascertained by detectives that one of the dead bodies recovered from the harbor in the opening scene was actually the body of a high government official, the departmental Chief of Police strongly suspects that Kato has become too strong and influential, believing he is so protected by his corrupt political ties that he can completely avoid police interference, even after ordering the execution of a government official. The Chief appoints Special Detective Kataoka  who has previously infiltrated the Sannokai syndicate by posing as a corrupt cop  to see if he can ignite further dissent between the already aggressive Sannokai Yakuza leaders. Kataoka decides to shorten Otomos prison sentence and have him released, theorizing that his returning presence might stirup bad memories of old bitter clan rivalries which prevailed before Otomo was imprisoned. This would potentially cause old cracks to resurface in this new and growing version of the old Sannokai. When Kataoka uses his influence to shorten Otomos imprisonment, Kato allows his lieutenants to order his assassination. Otomo, with careful calculation and help from the rival Hanabishikai, initiates a ruthless and bloody rampage through the ranks of the Sannokai in order to exact his version of justice for having been previously betrayed and forced to serve his prison sentence. His careful calculation pays off as his ruthless campaign to dismantle the new Sannokai leadership, including Kato, is efficiently carried out. The decimated Sannokai ends up being absorbed into the Hanabishikai under their Grand Yakuza leader, who has virtually unified the entire underground of all of Japan into a massive, single and centralized organization. In the closing scene, Otomo goes to a funeral home where some of his dead Yakuza brothers are being interred. He is surprised in the parking lot by Kataoka, who tells him that all the Yakuza leaders are inside and that he should not enter without a gun. When Otomo replies that he is unarmed, Kataoka  still acting the corrupt cop  offers his own gun. By now, however, it has fully dawned upon Otomo that Kataoka has been playing the two rival crime syndicates against each other in order to weaken and destroy the Sannokai. Upon receiving the gun, Otomo empties it into Kataoka at pointblank range, killing him.