Somewhere along the Canadian Rockies, dastardly villain S. Whiplash (Molina) and his band of outlaws seize the property of the townsfolk of Semi-Happy Valley and organize a fake gold rush. With thousands of prospectors storming into the area, only a dedicated but dimwitted Mountie, Dudley Do-Right (Fraser), stands in Whiplash's way. Do-Right's initial efforts to thwart Whiplash end disastrously and matters go from bad to worse when his girlfriend Nell Fenwick (Parker), falls for the charms of his enemy. Stripped of his badge and his girl, the usually sweet and naive Do-Right transforms into a masked avenger determined to take revenge.