Harry's father is killed in a gunfight, and his mother makes him swear he'll never again use his gun, and rely only on his bare fists. But when his little brother is branded on the chest by cattle rustlers, will Harry break his promise?
With the help of a reformed gunman (and a gang of outlaws), the sheepmen aim to win their water rights from the cattle barons of Rimrock Valley.
When cattle rancher Cheyenne Harry Henderson discovers that rustlers are attacking his herd, he informs Yucca County's sheriff but learns that the lawman is in cahoots with the outlaws.
