Princess Fishtail really digs her life beneath the water-living in a crystal palace, jumping rope with dolphins, and chatting with tuna on her cell phone. But one day when she rescues a handsome surfer, the mer-princess realizes she's been hooked-by love. The princess decides to spend the rest of her life on land with her true love, but one day she gets homesick for her old pals under the sea. Will a rotten old troll stand in true love's way, or can...