Chairman of the Shin Nihon Kaihatsu company Fukazawa, using clever ways to circumvent the law, rose to the top of the economic backstage. Three people are sacrificed to his greed. The president of a small company who committed suicide, a Yakuza who died during the destruction of his territory, and a former viscount whose wife and property were stolen by Fukazawa. Their sons vowed to hunt down Fukazawa and take revenge.
On his release from prison a young yakuza, along with his brother, decides to turn his back on criminal life instead of taking over the position of his recently deceased father, boss of the Asahina clan. But their exit proves more difficult than planned when their rival clan steps in to exact revenge.
When Shinsuke returns to Kyushu from the Russo-Japanese War he finds his Judo school hall neglected and in decay. His Judo teacher has died and his brother, Ryota, and the teacher's only daughter, Akiko, are greatly disturbed by Zanba, who intends to use the school for teaching the Ryukyu art of Karate.