Ultra-snobby Clara Frankofile has everything an eleven-year-old girl could want. She's fabulously wealthy, she lives alone in a penthouse apartment with its own roller coaster and bumper cars - and all New York City is terrified of her! Each night at the fashionable Pish Posh restaurant, Clara watches the glittery movie actresses and rock stars and decides who is important enough to stay - and who is not. But Clara's world is turned upside down when she discovers a most peculiar mystery is happening in the restaurant, right under her nose. With the help of Annabelle, a whip-smart, wise-cracking jewel thief, Clara embarks on a wildly dangerous mission through the streets of the city to uncover a two hundred year old secret.