 Johnny Mack Brown (Johnny Mack Brown), operating out of the Marshal s office, poses as a band bandit and stage robber, aided by his friend, stage driver Clancy (James Ellison as Jimmy Ellison), in order to learn the identity of a gang that has been pulling off stagecoach and bank robberies. The gang is headed by widowed ranch owner Ma Posey (Barbara Allen) and includes Blackie Marshall (Marshall Reed), Deuce Logan (Lane Bradford), Tad (Zon Murray) and a traveling bank examiner,Fleming (I. Stanford Jolley), who tips the gang off on money movement.