 Arriving in Red River to join their friend Chet Andrews (Russell Wade) in the ownership of a cattle ranch, Jim Carey (Tim Holt) and his pal Ike (Cliff Edwards) discover that Chet has been jailed for resisting the efforts of a swindler, Scott Yager (Eddie Dew), to evict him from the ranch. Yager, through a Spanish land grant, and with the help of a crooked Judge (Bob McKenzie), has proven ownership to all the land in the Red River territory. He nad his henchmen have been evicting all of the ranchers who won t pay rent on their own ranches. Jim and Ike gain the confidence of a crusading newspaper editor, Sam Sterling (Otto Hoffman) and his daughter Carol (Barbara Moffett). Jim and Ike, dressed in black robes and masks, attend a meeting ot the ranchers and offer to help them. They join Yager s gang and, following orders, collect the rent money, but then don their robes as Mr. Justice, and hold up Yager s other collectors and return the money. Jim breaks into Yager s office and finds proof that the land grant is a fake, but Yager discovers the robes worn by Jim and Ike, both as Mr. Justice, and has two of his henchmen wear them and take money from the ranchers, thus breaking their confidence in "Mr. Justice." And then, Jim and Ike are captured by Yager.