Toshiro Mifune as Matemon Araki, a renowned swordsman, helps a young man find vengeance. The opening scene has the Toshiro Mifune character sternly accosting the Takashi Shimura character with a formal proclamation of vengeance for the killing of his family member. Shimura cackles villainously and an epic fight commences.
Just then a narrator breaks in to explain that this is a traditional version of the showdown at Kagiya Corner that has been told through the centuries which happened at the start of the 17th century. It is about a vendetta because of the killing of a family member, and the samurai connected with the family want revenge and Toshiro Mifune is part of the samurai who go looking for a showdown. The facts surrounding the vendetta have been expanded and distorted through the telling, and the villain Jinza was actually a noble man and the close friend of Mataemon Araki which he faces off against at Kagiya corner. The movies goes to November 7, 1634, and Mataemon's party arrives at an inn on the site one hour before the fight will take place. As the men prepare for their ambush, we get a series of flashbacks filling in the backstory piece by piece.