 Steve Beaumont (Charles Starrett), an operative for the Cattleman s Protective Association, is asssigned the difficult task of breaking up a murderous gang of rustlers led by Ed Brock (Kenneth MacDonald) and Strang (Dick Curtis). He takes Sheriff Webb (Jack Rockwell), Judge Baxter (Edward LeSaint), and rancher Ann Houston (Lorna Gray) into his confidence, and works his way into the rustler stronghold and confidence by "turning rustler" himself.