On Valentine's Day, Sandy and Kirsten's conflict about Rebecca continues. Ryan tries to make peace with Caleb in order to spend Valentines Day with Lindsay. Meanwhile, Seth, Zach, and Summer head to San Diego in hope to make their comic book idea succeed. But it all falls apart when Seth has a emotional breakdown and he ends up in a lonely state. Marissa and Alex decide take a step forward in their romantic relationship, while Julie returns from her trip to Paris in a vain and futile hope to reconnect with Marissa.