An oil spill has contaminated the water around the island of Iloka and is polluting the food supply. This gives Dexter the idea to use the oil to drive the Milihune off the island. But Flipper, Lopaka and Charlie the Dugong trie to prevent Dexters Plan and save the Milihunes.

A family of stonefish arrives in Quetzo and is shunned by the locals, who are afraid of their grotesque appearance and poisonous spikes. Dexter carelessly pricks himself on one of the fish, and reveals he has the only known cure for their poison. So when Nola accidentally treads on one of the stonefish, Lopaka begs Dexter for the antidote.