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.
