When Dracula's venerable old werewolf retires to Florida, the vampire decides Shaggy will make the perfect replacement. Dracula locks Scooby, Scrappy, Shaggy and Shaggy's girlfriend, Googie, in his scary castle, where they are forced to dine on everything from frog fudge to spider souffle. And Shaggy becomes "shaggier" than ever when Dracula turns him into a werewolf! To become his old self, Shaggy must win the Monster Rally car race. But obstacles lurk around every bend: dangerous cliffs, lava pits, even vampire bees! And it will take everything Scooby and the gang can do to help Shaggy win.