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.
During the American Civil War, a Confederate prisoner, Clyde McKay, attempts to steal a box of gold from a Union prison camp. He is aided by a group of prisoners and a prison guard but he is double-crossed along the way.
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.
Three men meet in the same prison and in their cell they find a Mexican boy condemned to death for murder. One night the three convicts are mysteriously released by a priest and the father of the Mexican boy who promises them a reward of $30,000 if they can find the real murderer within ten days. Certain that the Mexican boy is not guilty, Reno and the others organize a plan which leads to the unmasking of the real killers.
Bespectacled pistolero Stan Ross comes to Canyon City and becomes involved with two feuding factions, after a clerk has been killed by the banker Jefferson during a botched holdup, while robbing his own bank.
Chad Stark is offered his life and a nice ammount of dollars if he is to bring back the runaway son of mexican land-owner Gutierrez . This son, Fidel, teams up with an outlaw band lead by a former military man going by the name The Major. When Stark finds Fidel he is reintroduced to an old acquaintance which makes his job of returning the son a lot more difficult.
Luke Barrett, having lost his memory due to an accident, does not realize that Dingus had killed his wife and brother to take possession of the Barretts' land and money. At first Luke trusts him, but while looking for his forgotten identity he discovers the truth.
When sheriff Joe Williams is unjustly accused of the murder of a young couple, which was in reality committed by the Mexican "La Muerte", Joe becomes a wanted man. Joe manages to steal and hide the loot from a bank robbery committed by the Mexican gang, but then is captured by them, but the new sheriff, Joe's friend, is on their trail.
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.
Bill learns that his father, during the American Civil War, was accused of theft and killed. Convinced of his innocence, Bill discovers the true robbers.
Returning home, Ross Logan immediately gets into conflict with the Carranza gang, which had just crossed the Mexican border and has occupied a nearby Hacienda. After his brother is killed he plans a cold blooded revenge for which he separates the gang's most dangerous members by using their individual weak points and the general discordance amongst them. The time for the final confrontation is set by the astronomically interested Logan amidst an eclipse.
Johnny King, a rebellious drifter, sets out to avenge the death of his mentor and friend, Steve, after he has been murdered for his land by the Ward Brothers. After causing some trouble for the Wards, Johnny faces a new opponent, his outlaw friend, Meredith.
When the lead robber in their gang steals the money from his two companions, a cat and mouse/back and forth game plays out as the men try to get the money for themselves. But another player, the heir of the sneaky gang leader, is also on the hunt...
A major of the dissolved southern army gives a dollar to a young cowboy, Alan Burton, telling him that there are two other similar dollars with different figures on them; the three numbers combined show the spot where the Confederate's treasure is hidden. A number of people get involved including a gang leader and Alan's sidekick, Hondo.
The bandit Pratt, looking for Tim, who is responsible for the death of his two sons, attacks a caravan killing all the passengers. Harry, the vagabond, after having robbed the dead, casually meets Tim and they become friends. Running away together from Pratt, they reach Harry's farm, but their hiding place is soon discovered.