Carter Mason is going to Costa Luna for a week to visit her best friend, the Queen! Rosalinda is preparing for Independence Day festivities, and Carter can't wait to join the fun. Rosalinda has another special guest at the palace, though-a spoiled, demanding, nine year old princess! Carter tries to teach the young girl how to blend in and be a true princess, which is no easy feat. Especially when she tells the girl she's a royal herself and is overheard by a boy in the marketplace. He's cute, he's smart, and Carter's crushing hard. But will he still like her if he discovers her secret?