Polly is caught between the prim-and-proper boarding school set she's grown up with and the legendary legacy of the Pirate Queen that she never knew she was a part of.
Under the ruse of improving Sunako's cooking, the landlady whisks the gang off to the small kingdom of Grimmell, where they find a young prince who shares Sunako's morbid tastes and just happens to be looking for a bride.