A stage line is once again threatened by a greedy rival in this ultra low-budget western from small-scale Monogram Pictures. This time the owner is lovely Phyllis Coates, who desperately needs to win a valuable mail contract in order to survive. The rival appears at first to be none other than the local sheriff (Pierce Lyden), but he is actually in the employ of a mystery man. Enter the whip-wielding Whip Wilson and his faithful sidekick Fuzzy Knight, and Miss Coates' stagecoach is saved in no time. In fairness to the age-old plot, here credited to former serial writer Joseph F. Poland, we shall not reveal the identity of the mystery villain; suffice it to say, the blackguard turns out to be the least likely candidate and is therefore highly suspicious from the get-go. Stage to Blue River was filmed many times before, most recently as Stage to Mesa City (1948), a "Cheyenne Kid" series entry featuring Al "Lash" LaRue and Al "Fuzzy" St. John.