Laws that protect wild horses frustrate cowboy Dan Hurley (Kenneth MacDonald) who wants to sell the horses. In an effort to get the laws changed, Hurley has his shady partners paint his trained horse to disguise it, then get the horse to kill a man; all in an effort to get his petition signed. Hero Johnny Revere (Robert Livingston) finds suspicious traces of paint on a horse, and attempts to arrest the Hurley gang. The effort goes south, and the bad guys capture Revere, then plan to have him be the next horse death victim.