When Gene and Pat go to take a drink at a waterhole, they find an empty bottle of poision along the banks. Gene then runs into his old Indian friend, Chief Tejon, who explains that the Central Valley Railroad are refusing to comply with their contract. Gene and Chief Tejon ride to the railroad camp to investigate. Gene has no luck, and rides to Willow Gap, where he finds the contract hidden in the office of the chief engineer, Craig. Pat discovers a connection between Craig's sister, and an assayer, who has bottles of poison in his office.

Gene is the sheriff of Santa Rosa. An outlaw gang is rustling horses, and a young man named Ted Doyle iss invovled. Gene arrests him hoping to get information. Ted's mother persuades Gene to clear his name, but Gene won't until he gets information. Ted decides to do one last favor for the gang by getting them some decent horses. Ted changes his mind, and goes home. Sagebrush find Ted's lucky rabbit's foot next to their now-empty stalls. Gene and the gang track down the outlaws who head for Ted's place and bring them in, while Ted is off the hook.