Two Mules for Sister Sara

William Walker and his mercenary corps enter Nicaragua in the middle of the 19th century in order to install a new government by a coup d'etat.

A mysterious woman comes to compete in a quick-draw elimination tournament, in a town taken over by a notorious gunman.

A band of Mexicans find their U. S. land claims denied and all the records destroyed in a courthouse fire. Their leader, Louis Chama, encourages them to use force to regain their land. A wealthy landowner wanting the same decides to hire a gang of killers with Joe Kidd to track Chama.

A gunfighting stranger comes to the small settlement of Lago. After gunning down three gunmen who tried to kill him, the townsfolk decide to hire the Stranger to hold off three outlaws who are on their way.