With the gunboat gone, Monsley decides to repair the Barracuda and use it in its place, while Orlo's gang is sent out to find Conan. Conan and Gil plan to blow up the Barracuda; Dyce, while getting away from the Industrians, stumbles upon Lana in the fish preserve. When the island's animals begin to act strangely, Lana knows that another earthquake is about to happen, und rushes to warn the villagers...