In this classic Western, buffalo hunter Matt Fletcher (Marlon Brando) plans on starting a horse breeding farm with his friend Paco (Rafael Campos) in the border town of Ojo Prieto. But when a Mexican bandit (John Saxon) steals his prized Appaloosa stallion, Matt crosses the border determined to get revenge. In search of his beloved horse, Matt falls in love with a beautiful woman (Anjanette Comer), battles a band of bandits and faces poisonous scorpions.