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.
Blaise Starrett is a rancher at odds with homesteaders when outlaws hold up the small town. The outlaws are held in check only by their notorious leader, but he is diagnosed with a fatal wound and the town is a powder keg waiting to blow.
Put-upon lawman John Dorsey is on the verge of losing his wife and his job as sheriff, so he posses up with bullish U.S. Marshall Butch Hayden to hold outlaw Emily Rusk hostage. A battle of wills ensues as Emily turns the posse on themselves, but as her marauding husband and his gang approach, Emily and John realize they will need each other to survive.
Cole Thornton, a gunfighter for hire, joins forces with an old friend, Sheriff J.P. Harrah. Together with a fighter and a gambler, they help a rancher and his family fight a rival rancher that is trying to steal their water.