Royal Canadian Mountie Dudley Do-right is busy keeping the peace in his small mountain town when his old rival, Snidely Whiplash, comes up with a plot to buy all the property in town, then start a phony gold rush by seeding the river with gold nuggets.

After a violent thunderstorm, mutilated bodies are found at a Louisiana campground. Investigative reporter Clint Harrison uncovers a local legend about the reclusive Dansen clan, who may be connected with the murders. Determined to dig up the truth, Clint and his buddies decide to spend a stormy night at the seemingly abandoned Dansen family mansion.