While in the Cimarron jail, wild and hot tempered cowpoke ""Screamer"" witnesses outlaw Ace Coffin commit the cold-blooded murder of a fellow bank robber. Knowing that there is a $10,000 price on Coffin's head, Screamer offers to help Crown track down the killer and his band of outlaws.

A would be homesteading family is so afraid after seeing two men lynched by a rancher's gang, they refuse to cooperate with Marshall Crown, until one of them blackmails the rancher.