Pirate Pearl lives aboard the good ship Mirabel with her crusty old shipmate - Grandpa Bert! She's not a real pirate - but Pearl loves to imagine she's sailing the seven seas on a swashbuckling pirate adventure! One day, Pearl finds a stowaway aboard ship. It's a little blue monster. But little monsters grow into big greedy monsters - and this one wants his DINNER! There's trouble ahead for Pirate Pearl!