Mexican's are being smuggled over the border to work as cheap labour for wealthy land baron Fargo. His gang is made up of known criminals with bounties on their heads, this greatly interests two bounty hunters who may have to team up to achieve their goals.
While moving a group of Apaches to a Native American reservation in Arizona, an American scout named Sam Varner is surprised to find a white woman, Sarah Carver, living with the tribe. When Sam learns that she was taken captive by an Indian named Salvaje ten years ago, he attempts to escort Sarah and her half-Native American son to his home in New Mexico. However, it soon becomes clear that Salvaje is hot on their trail.
As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.
After Cacopoulos manages to save himself from being hung on a false charge, he robs Cat Stevens and Hutch Bessy of a lot of money and steals their horses. This results in a merry chase and Stevens and Bessy become unwilling allies in Cacopoulus' revenge against the people who deserted him and framed him to get their money back.
The legendary Tomas Milian stars as Cuchillo, a knife-throwing thief on the run from murderous bandits, sadistic American agents, his hot-blooded fiancée and a sheriff turned bounty hunter, all of whom are gunning for a hidden fortune in gold that could finance the Mexican Revolution.
Jesse W. Haywood (Don Knotts) graduates from dental school in Philadelphia in 1870 and goes west to become a frontier dentist. Penelope "Bad Penny" Cushing (Barbara Rhoades) is offered a pardon if she will track down a ring of gun smugglers. She tricks Haywood into a sham marriage as a disguise. Haywood inadvertently becomes the legendary "Doc the Haywood" after he guns down "Arnold the Kid".
Posing as a hangman, Mace Bishop arrives in town with the intention of freeing a gang of outlaws, including his brother, from the gallows. Mace urges his younger brother to give up crime. The sheriff chases the brothers to Mexico. They join forces, however, against a group of Mexican bandits.
Pulled into the Mexican Revolution by his own greed, Texas gunrunner and pilot Lee Arnold joins bandit-turned-patriot Pancho Villa and his band of dedicated men in a march across Mexico battling the Colorados and stealing women's hearts as they go. But each has a nemesis among his friends: Arnold is tormented by Fierro, Villa's right-hand-man; and Villa must face possible betrayal by his own president's naiveté
Marshall Jed Cooper survives a hanging, vowing revenge on the lynch mob that left him dangling. To carry out his oath for vengeance, he returns to his former job as a lawman. Before long, he's caught up with the nine men on his hit list and starts dispensing his own brand of Wild West justice.
After spending many years in prison, Gary returns to Paso Bravo, where thugs burned his ranch killing his wife and daughter. Gary seeks revenge, and also finds a people who live terrorized by a group of gunmen led by Acombar. This situation causes Gary skip to face action this gang of murderers.
Dominated by men in her youth, Belle Starr now out-shoots and out-gambles them as she makes her way around the West. One man who's her equal is Larry Blackie with whom she has an on-again, off-again relationship. Together they become involved in a robbery which goes awry....