The classic Margaret Mahy story is about the consequences for young Oliver Terrapin when his parents make the old mistake of hiring a pirate as his baby sitter for the evening. Before you can say "ahoy there matey" pirates with names like Roving Tom, Belinda Blunderbuss and Terrible Crabmeat are descending on Oliver's house for the biggest pirate party that has ever been. Will Oliver play it straight like his parents have always told him to or will he join the salty shenanigans?