The lives of pirates Captain Widehide, Captain Leanbean and the crew of the Thick and Thin have been turned upside down by the cheeky baby Sweetie May. Instead of searching for treasure, they spend their mornings finger-painting and their afternoons singing nursery rhymes! But then Captain Nitpicker of the Spick and Span - the cleanest, meanest pirate ship ever to sail the seven seas - kidnaps Sweetie May, believing her to be a princess. How will Widehide and Leanbean get her back? And how will captain Nitpicker manage to keep his shop spick and span with a baby on board?