Whisker is a cyclone-surviving circus rat with a troublesome tail and a boat load of luck. When a strange ship pulls him out of the ocean, Whisker's new life as a Pie Rat apprentice begins.

Welcome aboard the good ship Apple Pie—a peculiar pastry-inspired ship where cannons shoot mouldy pies, coloured pencils are used as peg-legs and the champion swords-rat fights with two scarlet scissor swords.