When Koryu's childhood friend Shurei is abducted by gangsters, the desperate young woman recruits a female martial artist and a tough-as-nails stranger to join her for a dangerous rescue mission.

Kiku Nakakawa, the only daughter of an old kimono shop owner in Kyoto, is enthusiastic about karate. To help her friend Michi avenge her brother, she sneaks into a movie studio in Kyoto where a drug dealing syndicate is based.

Koryu heads to Yokohama in search of a woman named Birei, kidnapped by diamond smugglers who move their hot rocks by surgically implanting them into the nubile buttocks of Chinese prostitutes. Koryu's older sister, working as a jewelry designer, is secretly, if unhappily, involved with the gangsters.

Mr. Soh, a righteous man with a cold stare and fists of steel, returns to a lawless post-war Japan in 1946. He protects the weak, defends the poor and knocks some good sense into friends and enemies alike. Rapists and gangsters get the worst of it, as Mr. Soh builds up his school on the island of Shikoku.

A Japanese bullet train is threatened with a bomb that will explode automatically if the train slows below 80 km/h, unless a ransom is paid. Police race to find the bombers so the train crew can learn how to defuse the bomb.