Annie's mother comes to town and the two try to spend as much time together as possible. Chris runs away because Jan doesn't have enough time to spend with her. Frank and Annie lock horns over her finding him in her apartment.
Lucille and Ernie decide to try to have a baby. Jan goes out to a concert with Wade, causing Mack to rethink his feelings for her.
Frank gets Dave to listen to Wade's band, but Dave says he'll only sign them without Frank as a songwriter. Jan tries to study for the LSAT but a mouse has invaded their apartment.
When Stuart admits he's a virgin, Annie decides that it's time to rid him of that little inconvenience, but changes her mind when she finds out Stuart has told Frank they already slept together. Frank and Cynthia are having trouble with their relationship because he is angry and jealous of former partner Wade's success. But he is sincerely sorry to learn Wade's father had a stroke. Ben brings a string quartet down to the apartment building to serenade Marcia, in an attempt to get her back. She finally caves and tells him that she wants him in her life.