Set during the Mexican Revolution, a man known only as "The Dutchman" has a plan, and brings in four of his old acquaintences, including an old army buddy and a silent Japanese swordsman, to help him out by promising a $1000 reward if it succeeds. The plan turns out to be a fool's mission: rob a train carrying $500,000 in gold that's guarded by dozens of heavily armed soldiers and passes through a steady stream of military checkpoints. Naturally, his friends agree to go along with the scheme.

Shiba, a wandering ronin, encounters a band of peasants who have kidnapped the daughter of their dictatorial magistrate, in hopes of coercing from him a reduction in taxes. Shiba takes up their fight, joined by two renegades from the magistrate's guard, Sakura and Kikyo. The three outlaws find themselves in a battle to the death.

Peace in 17th-century Japan causes the Shogunate's breakup of warrior clans, throwing thousands of samurai out of work and into poverty. An honorable end to such fate under the samurai code is ritual suicide, or hara-kiri (self-inflicted disembowelment). An elder warrior, Hanshiro Tsugumo (Tatsuya Nakadai) seeks admittance to the house of a feudal lord to commit the act. There, he learns of the fate of his son-in-law, a young samurai who sought work at the house but was instead barbarically forced to commit traditional hara-kiri in an excruciating manner with a dull bamboo blade. In flashbacks the samurai tells the tragic story of his son-in-law, and how he was forced to sell his real sword to support his sick wife and child. Tsugumo thus sets in motion a tense showdown of revenge against the house.