The wandering swordsman, Ino Heihachiro, defeats Ichima, the youngest of the famed swordsmanship trio, the Nikis, but sustains an injury. In the mountains of Tohoku, he is aided by a young boy named Shosuke. Heihachiro finds refuge in the home of the boy's parents, Magoichi and Shino, only to discover that Magoichi was a skilled ninja from Koga. The peaceful days with the family are short-lived as Ichima, bent on revenge, along with his brothers Kurodo and Ryuma, pursue Heihachiro. Heihachiro and Magoichi head towards the duel's location, bu...
