Welcome to the land of Hurlingham, where catapulting is a way of life! Two feuding kingdoms, the industrious Stonetower and the magical Fyrebranch, are led by hotheads who haven’t gotten along for generations. But as bigger, non-catapult-related baddies emerge, the leaders’ children—when not embarking on fun-filled adventures—must outthink their impetuous parents to protect their fantastical land.