Big Boss

The students of Suzuran High compete for the King of School title. An ex-graduate yakuza is sent to kill the son of a criminal group, but he can't make himself do it as he reminds him of his youth.

Zen, an autistic teenage girl with powerful martial arts skills, gets money to pay for her sick mother Zin's treatment by seeking out all the people who owe Zin money and making them pay.

The plot opens with the hero (Tsuruta) leaving prison, having served time through taking the blame for a fellow gang member’s crime. However, his former gang boss seems to have gone to seed, with people now killing each other and dealing in drugs. The hero then teams up with a lone operator (Tamba) who specialises in shaking down gangsters.

When the boss of the Nakano Family decides to retire and makes a loyal follower the new boss instead of his own son, it causes strife in the family. Sides are taken and lines are drawn. Meanwhile, a rival family with a land dispute with the Nakano starts pulling strings behind the scenes...

Murakawa, an aging Tokyo yakuza tiring of gangster life, is sent by his boss to Okinawa along with a few of his henchmen to help end a gang war, supposedly as mediators between two warring clans. He finds that the dispute between the clans is insignificant and whilst wondering why he was sent to Okinawa at all, his group is attacked in an ambush. The survivors flee and make a decision to lay low at the beach while they await further instructions.