Oliver plans a new trip for the group by inviting them to Palm Springs for the weekend to play golf and travel around. But things don't go well for everyone, except for Oliver when his erratic behavior begins showing itself to Ryan and Luke, but Marissa brushes it off as just playful behavior. But when Ryan tries to tell Marissa that Oliver is not what he appears to be, he gets left out in the cold. Summer tries to plant herself into a "friendship" with Seth and Anna leading to a competition of wills over both of them. Meanwhile in Newport, Jimmy and Sandy decide to go into business together of opening their own restaurant while Caleb and Julie return from a two-month vacation in Europe. Also, Kirsten and Hailey continue to butt heads over Hailey's irresponsible behavior leading her to fin