The gang joins Daphne in Hawaii to design clothes for a company, but they're met with a warning about evil spirits on the island. Despite their doubts, they arrive in Hanahuna and get caught up in the excitement of the Big Kahuna Surfing Contest, which has been won by local legend Manu. However, the gang and the community are soon threatened by the vengeful Wiki Tiki demons, who have kidnapped Manu's girlfriend Snookie.
Aloha, Scooby-Doo!
The Mystery Gang's Hawaiian getaway turns sinister when they stumble upon the malevolent Wiki Tiki spirit and his minions, who have overrun the island and are poised to sabotage the renowned Big Kahuna of Hanahuna Surfing Contest.
