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...