When heiress Penelope Pitstop is threatened by a mystical menace, Scooby and the gang think the solution to the mystery is obvious: the culprits must be those seven notorious gangsters, the Ant Hill Mob. But our heroes don't know the Ant Hill Mob constantly saves Penelope from danger! With her pint-sized protectors locked in a jail cell, who can rescue Penelope from the malevolent machinations of the real villain, the Hooded Claw?