Frederic, who has spent his formative years as a junior pirate, plans to mark his 21st birthday by breaking free from the Pirate King and begin his courtship of Mabel. But because he was born on Feb.29, a date that only arrives every four years, Frederic isn’t technically 21, and the Pirate King is still his master. Frederic will soon be on a collision course with the Pirate King’s new nemesis: Mabel’s father.