After Billy, Fuzzy and Jeff are rescued from a hanging by mysterious strangers, the countryside if terrorized by three men, posing as Billy, Fuzzy and Jeff. Sheriff Masters puts Billy and his pals on the trail of the impostors. The trail leads to Mesa City, an outlaw town run by Jim Stanton, under whose orders, three killers, Montana, Pete and Curly, have been robbing and murdering, disguised as Billy and his two sidekicks. Billy brings in the impostors but they are released by crooked-judge Clarke. Stanton makes henchman Red Barton the new sheriff, with orders to get Billy. Again assuming their disguises, Montana, Pete and Curly rob the stagecoach. And Billy, Fuzzy and Jeff have to begin again in the process of clearing their own names.