LilyPad Princess

Princess Gwendolyn's normally boring life just got very strange. As always, there's Prince Jack, her royal pain of a brother, but then along comes Lily, the frog-turned-princess Gwendolyn found in the royal pond. Then the king puts Gwendolyn in charge of throwing a Royal Ball to find Lily's real family. Now, someone or something, is attacking the castle and leaving messages written with lily pads. Is the kingdom safe, or is Jack right -- does it have something to do with the frogs?