When the Scooby gang visits a dude ranch, they discover that it and the nearby town have been haunted by a ghostly cowboy, Dapper Jack, who fires real fire from his fire irons. The mystery only deepens when it’s discovered that the ghost is also the long lost relative of Shaggy Rogers! The Mystery Inc. team visits Shaggy's relative at her ranch outside a wild west tourist town. A ghost cowboy is scaring away the tourists and proprietors there. The five investigate.