Charlotte's thrilled -- Sophie's on her way from Paris to meet the BSG, and Charlotte's writing a special story as a welcome gift. But is the fashionable teen who shows up at the airport the BFF Charlotte once knew? Everyone at Abigail Adams Junior High goes wild for Sophie's style, Dillon falls head over heels, and Charlotte worries that her sophisticated friend is too cool for her! Meanwhile, Maeve is dreaming of a blowout Bat Mitzvah her parents simply can't afford. Can the BSG come to her rescue?