The high chaparral

Everyone at the high chaparral were doing their own things while Victoria was making dinner

The two-hour opening episode establishes the background to the action, bringing "Big John" Cannon and his family and brother Buck to the frontier high desert scrubland in the southern Arizona Territory near the border with Mexico, where they buy a run-down hacienda and establish a cattle ranch on it. The Apaches, under the leadership of Cochise, are hostile; John's wife Anna-Lee is killed in an early attack, and to survive, the Cannons are compelled to enter into an alliance with a rich and powerful neighboring rancher, Don Sebastian Montoya, who owns a huge estate on the Mexican side of the border adjoining the "High Chaparral".

Part of the price for the alliance is the sealing of the pact by the marriage of John Cannon to Montoya's beautiful, dark-haired, sophisticated daughter, Victoria, 30 years younger. Montoya's reckless son, Manolito, whose relationship with his father is strained, accompanies his sister to get away from Don Sebastian. John's son, Blue, is vehemently opposed to the strange "mixed marriage", coming so soon after Anna-Lee's death.

Reinforced by Montoya's men, the Cannons are able to fight off the Indian attacks, and with the services of Manolito as interpreter, manage to negotiate a truce, albeit a fragile one, with the Apache leader. The main reason for its fragility is that the U.S. Cavalry refuses to recognize Cannon's right to negotiate a private peace with the Apaches, and continued Army interference constantly threatens the unofficial treaty. Problems also frequently occur between the Cannons and the arrogant, resentful Don Sebastian, usually concerning the terms of their alliance.

Big John's brother, Buck, notionally the ranch's head cowhand, was a hard-bitten former soldier, who fought in the American Civil War, 10 years previously, on the side of the Confederacy. From time to time, Buck's past comes back to haunt him, usually in the person of other Confederate soldiers drifting through the territory,