Fifteen-year-old Plum Blatchley accidentally nearly ruins her mother's shot at getting a sweet gig as a party planner, which would have been awful as the family's finances are pretty stretched right now. Always chaffing under her older sister Ginny's genius, Plum just wanted to spread her own wings, but in doing so she winds up at the Lout Sophomore Boy Tate Kurokawa's huge mansion, and is gone just when Ginny may need her most, struggling with a secret of her own.