 Charlie, now back together with Kirsten, is trying to get on with his life until Kirsten s mother unexpectedly shows up and tells them that she has left her husband. Meanwhile, Claudia returns from summer camp with stories about meeting a boy named Byron, whom everyone thinks she made up. Julia s ex-flame, Griffin Holbrook, having graduated from high school, arrives in town during a leave he has with the merchant marines to try to reconcile with her. Also, Bailey and Will decide to take an end-of-the-summer road trip to Mexico. But Sarah and Will s girlfriend, Gina, spoil the fun by insisting they come along. Things get even worse for the guys when Bailey s jeep breaks down, the girls desert them, and their jeep gets stolen.