Arriving in Red River to join their friend Chet Andrews in the ownership of a cattle ranch, Jim Carey and his pal Ike discover that Chet has been jailed for resisting the efforts of a swindler, Scott Yager, to evict him from the ranch. Yager, through a Spanish land grant, and with the help of a crooked Judge, has proven ownership to all the land in the Red River territory. He and 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 and his daughter Carol. Jim and Ike, dressed in black robes and masks, attend a meeting of 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.