 Marshal Whip Wilson (Whip Wilson) and his pal, Texas (Fuzzy Knight), come to the aid of Joyce Westbrook (Phyllis Coates) after her father (Steve Clark) is killed by henchmen of a mysterious Mr. Blackwell, who is after the stage line contract left to Joyce. She tries to get a government mail contract, but one of the conditions is that her stage line must be proven safe. Whip, Texas and Ted Crosby (Lee Roberts) have several battles with the outlaws, and Whip learns that attorney Kingsley (John Hart) is one of the plotters and, with the help of the postmaster (William Fawcett), he discovers that Mr. Blackwell is really Sheriff Bill Preston (Pierce Lyden).