Animated musical adventure following Scooby-Doo (voice of Frank Welker) and the Mystery, Inc. gang. Shaggy (Matthew Lillard), Fred (also Welker), Daphne (Grey DeLisle), Velma (Mindy Cohn) and Scooby decide to take a relaxing vacation after solving yet another mystery. They go to the 'Vampire Palooza' festival run by Vincent Van Helsing (Jeff Bennett) and are called into action when a troupe of vampire actors successfully perform a resurrection ritual on ancient vampire Valdronya. Things get worse, with the vampire on the loose, when Daphne is kidnapped and forced to marry Valdronya. Will the gang be able to save her before it's too late? Synopsis Scooby-Doo, Shaggy and the gang are geared up for a relaxing vacation. Just make it anyplace with no ghosts or monsters! But, like, how very Velma to steer the Mystery Machine to Vampire Palooza. It’s not much of a scene until a singing vampire theater troupe, headed by pasty heartthrob Bram, meddles with an ancient resurrection chant, bringing the powerful vampire Lord Valdrona back to life. Now the festival is hopping, the stakes are flying, and the gang is in danger. Shaggy is sure he’s been bitten – Scooby-Doo, save yourself! – and lord Valdrona wants Daphne for his bride! In this all-new movie, the creatures of the night aren’t the only ones vamping it up. The whole gang is ready to sing and dance their way out of this one!