The gang go to Australia to investigate the recent disappearances of the performances at the music festivals, by the so called 'Yowie Yahoo'.
On vacation in Australia, Scooby and the gang attend a music contest held at Vampire Rock---where the legendary 'Yowie Yahoo' Vampire is kidnapping the musical acts, including the Hex Girls. Masquerading as heavy-metal band 'Those Meddling Kids,' Scooby and the others must discover the identity of the Vampire's minions.—T. Scott Montgomery <IzzyGarrish@hotmail.com>
Scooby Doo, Shaggy, Daphne, Velma, Fred, and the Mystery Machine arevacationing in Australia. After sight-seeing in Sydney, they head for theOutback to attend the Vampire Rock Music Festival. Legend says thatVampire Rock is the home of the Yoweeyahoo, an ancient Australian vampire.
The events of last year's festival are making Malcolm, Daniel, andco-promoter Russell very nervous. Following the festival, one of the bandscalled Wild Wind went camping on Vampire Rock and were never heard fromagain. Rumor has it that all three were kidnapped by the Yoweeyahoo andturned into vampires. Now, strange things are happening at this year'sfestival--sounds, lights, and smoke are issuing from Vampire Rock. Andlast night three vampires (who look like the members of Wild Wind) swoopeddown and carried off the band members of Matt Marvellous. Most of thefinalists have pulled out of the contest and are going home.
When Scooby and his party arrive at Vampire Rock, they are warmlygreeted by their friends, the Hex Girls, who are scheduled to open theshow. Sensing a mystery to be solved, Fred, Daphne, and Velma decide toform a rock group themselves and go undercover as The Meddling Kids.
Next band to arrive is the Bad Omens and their rather shady manager,Jasper Ridgeway. Fred immediately suspects them, as Jasper Ridgeway alsomanaged Wild Wind. Fred, Daphne, and Velma go nosing around Jasper'smotorhome, where they find the costumes worn by Wild Wind. Scooby andShaggy are chased by the three vampires, who also show up duringrehearsals and carry off The Bad Omens. That night, Russell's pick of theshow--Two Skinny Dudes--arrive, and Jasper immediately offers to be theirmanager.
It's finally the night of the festival. The Hex Girls start playingbut, during their performance, they too are kidnapped by the threevampires. In search of The Hex Girls, Scooby and company climb VampireRock where they find a secret passage that leads into a cave holding a lotof stage equipment. Enter the Yoweeyahoo and the three vampires, leadingto a long chase around the mountain. When the morning sun breaks over thehorizon, the Yoweeyahoo disappears in a puff of smoke, but the vampiresstill persist. The sun doesn't seem to harm them, and running waterdoesn't stop them either.
Eventually, Daniel traps the three vampires in a net, and theidentities under their vampire masks are revealed. It's The Two SkinnyDudes and Russell. No, wait! Pull off their second masks, and it's reallyWild Wind. They had planned from the beginning to scare away all the otherbands, leaving just The Two Skinny Dudes who would also disappear duringtheir performance to be followed by Wild Wind's triumphant return. Theyfigured the publicity would make them famous.
The Yoweeyahoo, by the way, turns out to have been a hologram createdby all the stage equipment found in the cave. [Original synopsis by bj_kuehl]