Iloka is threatened by a king tide, so the islanders build a wall around their village to keep the water out. However, Dexter breaches the wall and, as the sea rushes in, the villagers are forced to flee up the mountain. With the village underwater, Dexter and his henchmen move in and seal the wall behind them, proclaiming Dexter King of Iloka.

Dexter's niece Inky has joined Flipper's youth group. Shocked that his niece is friends with Flipper, Dexter decides to teach Inky a lesson by trapping her and her friends in an old ship. However, Dexter and the sharks get caught instead, and Flipper and Inky save them.