When the Royal Secretary of the Island of Kinkou arrives to inform fraternal twins Brady and Boomer of their royal lineage, their lives change drastically. Now, the boys must relocate and claim the throne as joint Kings of the island.

Hibachi, the best (and shortest) surfer on Shredder Beach bans Boomer and Brady from the beach after they tick him off. When efforts at befriending Hibachi fail, the boys end up challenging him to a Surf-Off, forgetting that they don't know how to surf.