Everyone is still reacting to the surprise engagement of Julie and Caleb. Kirsten is shocked, and a little burdened to find she's been asked to be Julie's Maid of Honor. Kirsten and Marissa end up in charge of throwing Julie's wedding shower, and Marissa invites an unwanted guest: Julie's estranged sister whom does not approve of her upcoming wedding whom she suspects that it's purely for money. Meanwhile, Theresa calls Sandy for help when she runs away from Chino and tries to avoid Ryan. Jimmy and Hailey continue their romance, and Seth awkwardly meets Summer's father. But Seth's lack of social skills make Dr. Roberts disapprove of him.