On vacation in Australia, Scooby-Doo and the Mystery Inc. gang attend a music festival held at Vampire Rock.

But the music goes flat when the gang learns that a legendary Australian creature called the Yowie Yahoo is kidnapping the musical acts and turning them into vampires! Masquerading as a heavy metal band, Scooby-Doo and the gang must survive a trio of rock-and-roll vampires if they want to crack the outlandish Outback mystery surrounding The Legend of the Vampire!