It is Hallowaiian on the Big Island of Hawaii, so Enthusiasm and mischief are in the air. Three friends, Eddie, Kai and also Leilani discover a mysterious idol in a cave whilst catching a waves . They uncover that they've unleashed an ancient evil upon the island in the form of a huge pineapple-headed monster. The youngsters find help in some friends and discover that to be able to vanquish the evil, his legacy must be uncovered by Kai, also believe that the stories of his ancestors.