Vengeance ain't never enough / Hugh Pixler.

Young Harley Cobb comes west after the Civil War and establishes himself in a good job at a flour grinding company in Boulder, Colorado. The girl he fell in love with on the way comes to join him so they can start a new life together. While his wedding is being planned, his employer sends him to Mishap Creek, Wyoming to buy a part for the mill. He gets into a fight, killing a gunman who is cheating and threatening four young cowboys over a game of poker. The man turns out to be the son of a wealthy and influential rancher. Harley manages to escape a lynching and, with help from a deputy, jail. But his troubles are just beginning. The rancher becomes obsessed with finding and killing Harley, even to the point of letting his ranch go to ruin and hiring the best guns in the territory. Meanwhile, a pretty barmaid who saw the shooting rides to Colorado to get help from Harley's friends. They battle the rancher to a draw near Cheyenne, and then again, in a firefight in Mishap Creek.