Rachel and Phoebe convince Joey to keep dating a girl that they are like. However, the girls must decide whether to tell Joey when they find out that she's not interested in a serious relationship with him. Monica unintentionally invites Janice to her wedding and she and Chandler are unable to tactfully uninvite her. Ross is proud to find his thesis in the library but gets upset when he discovers it is in a section that is so deserted that students go there to make out.