Isaburo (Mifune) is a reknowned swordsman in 18th-century Japan who is the model of loyalty until his overlord demands the return of a former mistress, who is now Isaburo's daughter-in-law. This insult to his family forces Isaburo to take a deadly stand, which turns out to be against his best friend (Nakadai) who's trying to uphold the feudal code. Lots of swordplay. Last in Kobayashi's trilogy following "Harakiri" (1962) and "Kwaidan" (1964). Japanese with subtitles.