Phil Dolan (aka Black Jack because of his talent at cards), Nancy Dolan, and a rustler all have a piece of a silver dollar with each piece having a portion of an indented map of an ore mine. Phil has to rescue Nancy from the rustlers to keep their portions of the silver dollar from the rustlers. The sheriffs's pose captures the gang of rustlers just as they reach the ore mine ensuring their claim to the mine.
Reed Lathrop returns to his old home, accompanied by his friend, "Toad" Hunter, to investigate a plot that forces ranchers to sell their properties for very low prices. Finding the ranchers demoralized, he organizes a vigilance committee and enlists the aid of the local circuit judge. Darnell, the owner of the saloon, and Blodgett, a local dealer in ranch property, are unmasked as the culprits. Soon a showdown takes place with the ranchers and the outlaws, ending with the criminals hauled off to prison.
Dr. Henry Jekyll believes that there are two distinct sides to men - a good and an evil side. He believes that by separating the two, man can become liberated. He succeeds in his experiments with chemicals to accomplish this and transforms into Hyde to commit horrendous crimes. When he discontinues use of the drug, it is already too late.