Columbian Enrique Cuellar (Ricardo Montalban) has inherited land which was leased and used by Judge Garth. The Judge wants to renew the lease or buy the land outright. He minimizes its importance to his operations even though it contains a pass needed to drive his cattle herd between its seasonal ranges. Enrique discovers this deception and demands a large amount of money for the land. The Judge decides to drive his cattle through the land before Enrique can get a legal restraining order and in turn Enrique begins erecting a barbed wire fence to block the passage. A violent confrontation seems inevitable but is prevented by an unpredictable event involving Betsy Garth.

This episode reveals why Henry Garth is no longer a practicing Judge. In flashback it recounts how he had to sentence, and deservedly, a man to death for murder. However, the man's relatives, led by Jake Carewe (Clu Gulager), intimidated the townsfolk to the extent that they tried to get the Judge to set the man free. When the Judge stood up to the family, he had to do so without support from the town.

After delivering a herd of cattle to New Orleans, the Virginian meets and falls for a mysterious woman, Marie Valonne (Madlyn Rhue). He is attacked and the woman disappears. In his attempts to relocate her he comes into conflict with Johnny Madrid (Mark Richman) who controls some corrupt politicians. Despite the assistance of a local police detective, Dan Bohannon (Skip Homeier), the Virginian is unsuccessful in finding Marie and is only left with her picture.

A cougar kills a Shiloh hand and Steve Hill, experienced in hunting these animals, tracks it into the mountains where he comes upon a homestead owned by Nancy Mayhew (Joyce Bulifant) and her husband Charles (Jack Klugman). The Mayhew's have strained relations and it is learned Charles son was killed by the same cougar. Nancy blames this on Charles' cowardice and indicates a romantic interest in Steve, an interest which eventually endangers Steve's life.

A young drifter named Randy (Randy Boone) camps with Silas (Frank Maxwell) and his young daughter Melanie (Claire Wilcox) near Medicine Bow. Silas reveals he has been mining and that he found gold nuggets. Silas is murdered, the gold stolen and Randy is accused of the crime. He hides out with Melanie who knows him innocent and with help from Betsy Garth and the Virginian is eventually able to expose the real killers.

Lars Holstrum (Peter Whitney) is a middle-aged and wealthy rancher friend of Judge Garth's who is about to marry a 20 year old girl. Lars injures his back and Trampas is given the job of traveling to Laramie to pick up the girl, Katia Swenson (Katherine Crawford). On the return trip the two have a series of misadventures revolving around encounters with local Indians, a group of cowpokes, and a mysterious man who has been trailing them from Laramie.

In this pilot episode for the Laredo TV series, Trampas must pick up a bull for Shiloh Ranch in Mexico, and along the way he runs into Texas Rangers Reese, Joe, and Chad. Trampas ends up helping the Rangers recover stolen gold, and bring in the Bandits that stole it.

Randy's family visits from the hills of Bald Knob to protect him from a Claiborne who has been released from prison. Randy's testimony helped send him to prison. His daughter a childhood friend of Randy complicates his desire for revenge.