The members of Mystery, Inc. join forces with Batman and Robin for a cliff-hanging tale about a counterfeiting ring operated by those two arch-criminals, Joker and Penguin.

When Jonathan Winters invites Scooby and the kids to stay at the farm of his friend, Maude Frickert, they mistakenly believe it will be a vacation from haunted houses and spooky characters. They soon learn differently when vandalizing scoundrels and truly scary scarecrows overrun Maude's farm.