Sparky feels jealous of the new, fast Iron Horse train which Mr. Engineer describes as being better than horses. Later, they rescue Priscilla Skunk after she accidentally touches a lever that caused the Iron Horse to go out of control in a high rate of speed, Sheriff Callie teaches Sparky that no train can replace a trusty horse. While Sheriff Callie is helping Cody deliver his mail, Peck is appointed as the substitute sheriff. However, he goes out of control by putting all the residents of Nice and Friendly Corners in jail for reasons that make little sense and not knowing that an escaped convict named Billy Goat the Kid is ransacking the town stealing the townsfolks' belongings, including Peck's Horseshoe trophy.