Young Peter Ott gets entangled with a rancher’s wife and is forced to leave home. He becomes a deputy in Durango, only to be shot, because of his inexperience, during a gunfight. He learns the rudiments of becoming a fast gun from a gunman whose future death he is sworn to avenge. He becomes a deputy in Globe, chasing down various outlaws throughout Arizona. An eastern manufacturer pays Ott to avenge the death of his son who was hung along with two other cowboys by vigilantes on the Mogollon Rim. Also, Bull Davis, who owns mining and agricultural interest, pays Ott to avenge the death of one of his ranch foremen. Ott learns who killed the cowboys, but cannot bring them to justice, but he reports most outlaw deaths to the manufacturer as Rim assassins. For each, he gets paid. Ott arrests a man named Champion for the bushwhacking of Bull’s ranch foreman. He is acquitted by a fearful Lincoln County jury. Ott tries every strategy to egg Champion into a gunfight. Champion is too clever until Ott tricks him in Globe. The final revenge is acted out on the Mogollon Rim.