A newly arrived governor finds his province under the control of the corrupt Colonel Huerta. To avoid assassination by Huerta, he pretends to be weak and indecisive so Huerta will believe he poses no threat. But secretly he masquerades as Zorro, and joins the monk Francisco and the beautiful aristocrat Hortensia in their fight for justice against Huerta and his soldiers.

It's 1881 in New Mexico, and the times they are a'changing. Pat Garrett, erstwhile travelling companion of the outlaw Billy the Kid has become a sheriff, tasked by cattle interests with ridding the territory of Billy. After Billy escapes, Pat assembles a posse and chases him through the territory, culminating in a final confrontation at Fort Sumner, but is unaware of the full scope of the cattle interests' plans for the New West.

After a cavalry group is massacred by the Cheyenne, only two survivors remain: Honus, a naive private devoted to his duty, and Cresta, a young woman who had lived with the Cheyenne two years and whose sympathies lie more with them than with the US government. Together, they must try to reach the cavalry's main base camp. As they travel onward, Honus is torn between his growing affection for Cresta, and his disgust for her anti-American beliefs. They reach the cavalry campsite on the eve of an attack on a Cheyenne village, where Honus will learn which side has really been telling him the truth.

The gangster Colorado kidnaps Marshal McKenna. He believes that McKenna has seen a map which leads to a rich vein of gold in the mountains and forces him to show him the way. But they're not the only ones who're after the gold; soon they meet a group of "honorable" citizens and the cavalry crosses their way too - and that is even before they enter Indian territory.