Set in Aizuwakamatsu, where resort development is progressing, the sixth installment of the gangster action series that depicts the battle between the eastern and western gangsters aiming for national domination.

The group that Hitoshi and Yoshiro once crushed after a fierce battle, the angry party. Takeda, a former Black Dragon Society executive who was in the office after the conflict, infiltrated the Black Dragon Society after his release and took the position of executive. At that time, Hitoshi and Yoshiro were following the case where a familiar Sokaiya colluded with a major trading company and embezzled 500 million gold. It was because they were in the Shima of the sand group, and there was information that the general assembly shop borrowed money from the yakuza and was busy repayment. As I proceeded with the investigation, it turned out that the yakuza was the Black Dragon Society. Hitoshi and Yoshiro learn about the existence of Takeda, a former angry party.

The Kanto Ichienkai without Jin lost its cohesiveness and appeared to be a group of men. Sunagawa, who was concerned about the absence of a strong leader, recommends Jin to be the chairman of the Sumida River Union, a leading organization within the Ichienkai. At that time, a man in the sand group Shima comes over. Masaaki Sunagawa, a nephew of Sunagawa, a major executive in the black society of Shikoku. Masaaki offers to liven up Sunagawa at Shima in the Kanto region ?!

Ryoko, a childhood friend who has come to Tokyo to take the nurse's exam, goes missing on the day of the exam, and Maji rushes to find her. ......

Two childhood friends fall for the same boy.