Steve Beaumont, an operative for the Cattleman's Protective Association, is assigned the difficult task of breaking up a murderous gang of rustlers led by Ed Brock and Strang. He takes Sheriff Webb, Judge Baxter, and rancher Ann Houston into his confidence, and works his way into the rustler stronghold and confidence by "turning rustler" himself.
| Actor | Role |
|---|---|
 Charles StarrettSteve Beaumont | Steve Beaumont |
 Lorna GrayAnn Houston | Ann Houston |
 Bob NolanBob | Bob |
 Dick CurtisStrang | Strang |
 Kenneth MacDonaldEd Brock | Ed Brock |
 Jack RockwellSheriff Webb | Sheriff Webb |
 Edward LeSaintJudge Baxter | Judge Baxter |
| FFrancis WalkerHenchman Ellis | Henchman Ellis |
 Eddie LaughtonShorty - Bartender | Shorty - Bartender |
| LLee PratherTom Andrews | Tom Andrews |
 Hal TaliaferroEb Smith | Eb Smith |
 Pat BradyPat - Sons of the Pioneers | Pat - Sons of the Pioneers |
| JJack EvansMan at Trial | Man at Trial |
 Hugh FarrHugh - Sons of the Pioneers | Hugh - Sons of the Pioneers |
| KKarl FarrKarl - Sons of the Pioneers | Karl - Sons of the Pioneers |
 Herman HackStage Guard | Stage Guard |
 Lloyd PerrymanLloyd - Sons of the Pioneers | Lloyd - Sons of the Pioneers |
| TTim SpencerTim - Sons of the Pioneers | Tim - Sons of the Pioneers |