Since Carter's departure, Kirsten has been drinking more than just tomato juice for breakfast, and when Sandy questions her, he's left to sleep alone in the bedroom. Marissa's nervousness around Ryan leads him to wonder if something has happened between her and Trey. Summer, tired of Seth and Zach behaving foolishly, confronts Reed about the graphic novel and finds herself center stage at the "Atomic County" launch party. Meanwhile, Caleb shows Julie that a picture is worth a thousand words.