SCUBA diver Dane Dorrance hopes to earn his Dad's UDT flippers. Judy Walton hopes to land the lead in the movie "Sea Devils". Biff Bailey hopes to prove he's not a "clumsy ox". Nicky Walton hopes to prove he's a man. Working together, they find a sunken galleon and treasure, fight off a shark, octopus, and Godzilla-monster; and discover they really want to be a team of "underwater trouble shooters" called Sea Devils.