Some men operate beyond the law's reach. Such are the Macreedy's. They sell whiskey to the Indians across the Canadian border, then cash in their loot (including that gained from the selling of Indian women and children) and return to their horse ranch outside of Rimrock, Wyoming, outwardly living respectable lives. But the killings of an ex-Mountie in Wyoming reveals their fiendish operation to three travellers. Unfortunately for the Macreedy's, one of those travellers is Scarlet Valeron, who promises the dying MP that her family will see justice done.