Everyone is still reacting to the surprise engagement of Julie and Caleb. Kirsten is put in a difficult position when asked to be Julie's maid of honor, and her and Marissa end up in charge of throwing Julie's wedding shower. Marissa invites an unwanted guest, Julie's estranged sister Cindy. Theresa calls Sandy for help and tries to avoid Ryan. Jimmy and Hailey continue their romance. Seth awkwardly meets Summer's father.