Ryan, the Cohens, the Coopers and their friends build new lives, resolve lingering issues, face major decisions and undergo shocking personal transformations.
When Seth visits Summer at Brown, he finds an empty dorm room. Meanwhile, Sandy and Kirsten take advantage of an opportunity to bond with Ryan, who is in a Taylor-induced haze.
Ryan plans a special surprise road trip for Taylor and himself. But when Summer confronts Seth about not making any plans, Ryan's romantic getaway for two is spoiled.
Summer and Che take their activism to a new level, resulting in more freedom than they expected. Meanwhile, Julie flirts with a hot tennis instructor whom Kaitlin likes.
On her 40th birthday, Kirsten gets some news that will change her life forever. Meanwhile, Julie is having a secret love affair while Kaitlin does everything she can to stop it.
