Mexico, 1912. A tough Arizona lawman, deputy sheriff Lyedecker (Jim Brown), travels to a remote village looking for "Yaqui" Joe (Burt Reynolds), a half-Indian, half-white bank robber who's stolen $6,000 to buy rifles for his besieged brethren, the Yaqui Indians. His people are fighting the Mexican government, which has set out to annihilate them, and Joe pleads for Lydecker's help. But Lyedecker is determined that the money be returned to its rightful place - a Phoenix bank - and he'll stop at nothing to make sure that happens. However he didn't count on the sultry guerilla leader Sarita (Raquel Welch), whose seductive charms convince him to fight on the rebels' side. Complete with a thundering score by Jerry Goldsmith, 100 Rifles is one of the most explosive, action-packed Westerns of its era.