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.
Crafty railroad worker Bart becomes the first Black sheriff of Rock Ridge, a frontier town about to be destroyed in order to make way for a new railroad. Initially, the citizens of Rock Ridge harbor a racial bias toward their new protector. However, they warm to him after realizing that Bart and his perpetually drunk gunfighter friend Jim are their only defense against a wave of thugs sent to rid the town of its population.
Two black bounty hunters ride into a small town out West in pursuit of an outlaw. They discover that the town has no sheriff, and soon take over that position, much against the will of the mostly white townsfolk.
History Professor Brad Fletcher heads west for his health, but falls in with Solomon Bennett's outlaw gang. Fascinated by their way of life, Fletcher finally takes over the gang, leading with a new 'efficient' ruthlessness.