 Joe Kidd is a former bounty hunter and all-around tough-guy in the American Southwest. When a band of Mexicans find their U. S. land claims denied and all relevant records destroyed in a courthouse fire, they turn to force of arms. Louis Chama is their charismatic leader, spouting revolutionary rhetoric and demanding land reform. A wealthy landowner with interests in the disputed area, Frank Harlan, decides to settle things his own way. He hires a band of killers and wants Joe Kidd to help them track Chama. Initially, Kidd wants to avoid any involvement, until Chama makes the mistake of stealing Kidd s horses and terrorizing his friends.