Aging samurai Isaburo (Toshirô Mifune) challenges the ruling warlord in Masaki Kobayashi's compelling tale of a peaceful man who's pushed too far. When a mistress displeases the lord, he demands that Isaburo's son marry the woman. Isaburo takes the girl in, and to everyone's surprise, she falls in love with her intended husband. But when the temperamental lord reverses his orders and demands his mistress's return, Isaburo bravely takes a stand.