Jack Kells, leader of a band of outlaws known as "The Border Legion," finds the townspeople of Alder Creek, Idaho, irate and about to hang Jim Cleve for the killing of a miner, a crime of which one of Kells's own men is actually guilty; he saves the jobless cowboy, and out of gratitude Jim joins the gang. While they are hiding in the mountains, Hack Gulden kidnaps Joan Randall, and Jim is assigned to guard her; but he threatens Jack when he tries to make advances to the girl and returns to town to organize a posse. Believing an armed posse will come in search of the girl, Jack orders an immediate attack on the town; but the townsmen, not trusting Jim, have imprisoned him and are prepared for the Legion with bullets and dynamite. Jim helps Jack and Bunco Davis escape, but the latter is mortally wounded; when Hack Gulden imperils Jim and the girl, Jack confronts him in a gunbattle in which both men die.