Willa Parker, 646th and least popular resident of What Cheer, Iowa, is headed east to start a new life. Did she choose this new life? No, because that would be too easy -- and nothing in Willa's life is easy. It's her famous genius mother's idea to send her to ultra-expensive, ultra-exclusive Pembroke Prep, and it's only the strength of her name that got Willa accepted in the first place. But W…