Matt is uneasy when his mother's oldest friend—a boy crazy divorcee named Rachel, makes a pass at him. Mary goes with Matt and Rachel to a coffeehouse, and makes her public singing debut when she learns the band's singer didn't show up. When Mary gets a phone call asking her to fill in again, Eric and Annie are shocked by the news, but they agree with one specific condition: they are going with her. Back at home, Ruthie has a going-away party for her longtime imaginary friend, Hooey, and Lucy tries to cope with the fact that her best friend, Suzanne, is moving away.