John Cannon's first wife is killed during an Apache raid. Buck, his brother, can't stop Mexican bandits from rustling cattle. Unable to fight on two fronts -- against Mexican marauders and the Indians -- John arranges a defense agreement with his neighbor in Mexico, Don Sebastian Montoya. The Mexican insists that John seal the agreement by marrying Victoria, his daughter, thus solidifying an alliance against the Apache. Moreover, Don Sebastian demands that Victoria's carefree brother, Manolito, come along to guarantee her safety.