When a string of champion rodeo riders turn up dead under suspicious circumstances, Marshal George Higgins (George Hayes) sends plucky cowpoke John Weston (John Wayne) undercover to find out who's behind the killings. Weston works his way into the conspirators' confidence, only to become their very next target. Robert N. Bradbury directs this early Wayne Western. Polly Ann Young co-stars as the Duke's beautiful young love interest.