Tiggy has always had the ocean in her blood - and lately, she's been dreaming of mermaids - but she's a high-born girl on the Isle of Fortune, forced to wear dresses, attend balls and (worst of all) comb her wild curls. But then the Pirate King strikes, wielding deadly turquoise magic, and Tiggy's younger brother is stolen - along with every boy on the island. Tiggy knows it is time to claim her destiny, take to the high seas and rescue the boys of Fortune...