An invasion of reformers and prohibitionists has led to the gradual disappearance of the big herds of buffalo from the Great Plains. In Sulphur Creek, the saloon owners have hired gunslingers to intimidate these newcomers, and young Jock Sumner is caught right in the middle. As a ward of the town marshal, Sumner is hot property. And when a hunter named O'Brien learns that the boy and the town are in trouble, he decides that it is up to him to prevent a war from tearing the town apart...