The Sheriff of Red Bluff brings an unknown lawman to town to track down the band of outlaws that robbed the State Bank of a $30,000 payroll.
To avoid suspicion that an investigation is underway, Agent Rocky Camron and his pals join Pop Martin's Traveling Medicine Show as entertainers: Marshal Maynard is a sharpshooter and lariat artist, Ed Dean is a singing cowboy, and "Alibi" Terhune is the show's ventriloquist.
Sure enough, when one of the stolen bills is used to buy a bottle of Pop Martin's Medicine, the trail leading to the outlaws gets red hot.