The title character is a British boy who was abandoned on a desert island as a baby and survived as a feral child by learning to breathe underwater and talk to shark and other sea creatures. He also developed webbed fingers and toes which gave him the ability to swim as fast as a car. The strip follows his adventures as a teenager as he travels the world's seas searching for his long-lost parents and helping people in trouble. He can breathe underwater because he's a "hero". Goodall also wrote Kid Chameleon for Cor!!, another comic strip featuring a feral boy on a similar quest.