Sentaro is been severely beaten for his defiance of the government and the high taxes during a time of famine. He is befriended by Kada Gentaro, a leader in the Mito Tengu group, which plans to overthrow the shogunate.

Shinobu and her brother Genichiro plead with famous swordsman Musashi Miyamoto to teach them to avenge their father's death. The perpetrators of their father's demise see the siblings practicing, and so enlist the help of another revered swordsman, Kojiro Sasaki, giving the latter an excuse to battle Miyamoto.