Brady and Boomer are banned from the beach by the top surfer who is known as "The Big Kahula" who's also known as Hibachi. After being banned from the beach they return and they make an impossible bet with Hibachi that they will beat him in a surf competition and take back the beach. Hibachi states that if he wins, then no one will be able to surf on the island ever again, but him and his friends. Brady and Boomer enlist in a boot camp run by Mason, who attempts to train them so they can learn how to surf, and take the beach back. Mason was formerly the top surfer, ...
Brady gets jealous when Mikayla starts hanging out with her friend Tristan who is into extreme sports. To impress her, Brady joins school and tries to do extreme sports. Meanwhile, when Boomer and Brady are placed with all the little kids, Boomer becomes attached with the kids.
Boomer becomes good friends with a boy from the Flaji clan, a neighboring tribe that Brady begins to suspect are cannibals and want to have Boomer for dinner, so he hatches a plan and attempts to infiltrate the tribe's village while Mason also gets the crazy cannibal theory in his head
The guys get ready for the Junga Ball tournament against other islands so Brady becomes the leader of the guards who made the team. When Boomer doesn't get to rule the team as much as Brady, Boomer starts his own team with help from Kinkow's residents. The two teams compete to see which team would represent Kinkow.
The two kings are told that they have to try to win a competition when they attempt to arrange a treaty with an adversary island. The winner receives the reward of a princess, but Brady and Boomer discover she is not a typical princess.
After learning their father was the best warrior in island history, Boomer and Brady enroll in Kinkow Fight School. When Mason gives the kings special treatment, jealousy overcomes Mikayla. Taking Lanny's advice, she decides to test the kings' newfound confidence and skills by pitting them against Atog the Giant. But when Mason finds out, Mikayla tries to get the kings to back down, but it's too late, the kings are eager to prove their inner warrior
Boomer and Brady discover Vault 14, a secret vault which protects Kinkow's most mysterious and powerful artifacts including Duplicatus Plantus, a plant that copies anything it touches. The kings make clones of themselves and while they go surfing, they send their doubles to the Kalooki Island Peace Summit. Filling in for the brothers, the clones impress Mikayla, the island dignitaries and the other Kinkowians with their intelligence, hygiene, and professionalism. However, when Brady and Boomer overhear the clones' ultimate plan to takeover, the kings must figure out ...