Dexter and his henchmen have a big feast, but make a mess of Quetzo with their litter. Flipper makes them clean it up, but the sharks secretly dump it in the Big Deep. The next day Iloka is terrorized by a huge sea serpent. Lopaka and Flipper discover that the serpent is from the Big Deep, and has some of Dexter's rubbish caught in its throat.

Vain villain Dexter is trying to get the main part in a monster movie by any means.However, the director thinks Dexter looks too mechanical and 'unrealistic' and won't use him. Offended, Dexter decides to make the movie himself and kidnaps the director and his camera.