This story is about three little kids who dream of becoming real pirates. The small fish Flip, the small jellyfish Sue and the sea duck Quack live with their grandfather – rather strange old pirate pensioner Captain Kraken. The Captain devises different pirate tasks for them: to tie up sailor’s knots, to find treasure or to obtain a stone of absolute courage, for example. The grandchildren are enthusiastic about the tasks, but they have a lack of experience, knowledge and courage. In the end, everything turns into some comic and funny adventures.