Velma gets asked by her uncle Dave to visit. But while visiting, they find out that he's vanished. Then, they encountered the legendary Willawaw and two Owlmen who may be responsible for uncle Dave's disappearance. Legend has it if an owl calls your name, you'll be the next victim the Willawaw claims.
The kids visit Skull Island, where there's an old prison still inhabited by Iron Face, a mean prisoner who had a iron mask welded to his face. With him and his torpedo-like sharks, will the kids last long?
The gang go to Decade Records recording studio to see a live recording from their friend, Jimmy Lewis, but the building is haunted by the Phantom, who is trying to find a song by a missing writer, and will stop at nothing until he gets it.
The gang travel to China to visit a friend. While there, the gang run into the Moon Monster, who is turning people into stone if they run into its shadow.
The gang visit their friend, Antonio, in Venice, Italy, and find that he's haunted by the ghost of an ancestor, the Ghostly Gondolier, who seeks to steal the ancient necklace/family heirloom Antonio wears!
The gang head to Puerto Rico to go on holiday. They visit an ancient fortress where the ghost of General Juan Carlos, who guards the El Moro Fortress, warns them to stay away.
While touring England, the gang come upon tennis star, Jimmy Pelton, who's been cursed by Anthos, a warlock, and told to forfeit the Wimbledon tournament.
On a fishing trip, the gang end up in Canada at the newly deserted village of Bottomless Lake. Turns out the beast has scared everyone away, which only leaves Scooby, and the gang, to fritter away.
