Dracula fears they will have to cancel the race due to this sudden absence. Luckily, Dracula's wolf-like minion Wolfgang also notifies him of a way to create a new werewolf. After searching an old book for information, it is revealed that every five centuries, the full moon comes into the perfect position to transform a human into a werewolf, on three nights in a row that begin the following night. The one next in line to become the next werewolf is revealed to be none other than Shaggy Rogers, who recently demonstrated his skills on the racetrack by winning a car race with the help of his pet dogs that serve as his pit crew, a talking Great Dane named Scooby-Doo, and Scooby's young nephew Scrappy Doo.