Gene and Pat save a runaway wagon only to find it empty. Gene finds the driver, who says his only passenger, Driscoll is missing. Gene finds him at the sheriff's office, when Gene learns Driscoll is working undercover for a Colorado mining company. Pat follows him and his men to a mine, where he is trapped inside a cave. Gene finds Pat's horse, and follows it to the mine. The owner of the general store admits to being the missing mining engineer, and lights a stick of dynamite to free Pat. Pat is saved by the cave being blown open, and the store owner is proven innocent. Gene and Pat track down Driscoll and his men, and bring them in.