Hurricane Portia is causing chaos, even at sea! Uma, the seahorse, Worrall, the penguin, Kaia, the seagull, and Fenena, the tuna, stumble across a submarine. To their surprise, the submarine appears to have run into trouble! Follow these sea creatures’ adventures, hear their vivid past, and share in their heroic deeds together with aquarium divers and a rescue submarine. Can they save the trapped submariners? Find out in this wonderfully exciting tale.