Synopsis by Hans J. Wollstein
Long before she became a star, a still brunette Jean Arthur toiled in B-westerns produced by Lester F. Scott, Jr.. Riding Rivals featured one of Scott's discoveries, the tight-lipped Wally Wales. Wales played Wally Carter, whose relationship with pretty June Matthews (Arthur), the sheriff's daughter, is destroyed by the disreputable reputation of his father (William H. Turner). Wally is found guilty of murdering the unscrupulous Dan Morgan (Frank Ellis), the man responsible for Pa Carter's reputation, and is about to be led away when the "victim" is revealed to be merely knocked unconscious. With the nasty Morgan behind bars, Pa Carter is peacefully reunited with his wife (Fannie Midgley), son, and future daughter-in-law.