Mary's sudden arrival has everyone in the family wondering what happened between her and Wilson. Only Mary knows and she's not telling. Her presence delights Annie, who goes out of her way to make her daughter comfortable, even offering her the converted garage apartment. But not everyone is happy to see her. Ruthie feels that Mary owes everyone an apology for the actions that led to her moving away.

Eric gives Annie his manuscript to read but she's not happy to learn that he's been spending his time writing smut instead of his comeback sermon for the church. Meanwhile, Simon and Cecilia discuss having sex for the first time and naively share the news with their parents---which doesn't go to well when Cecilia's father finds out. Lastly, Lucy sets out to spy on Roxanne and Chandler on their first date.

Eric is brought in by the school board to help investigate the local high school Principal, when more than one concerned parent questions her behavior. When a female student disappears, all fingers point at Ms. Jones, but Eric believes strongly that the student's father may be the real culprit. Elsewhere, rumors about Martin upset Cecilia, who then regrets talking to Ruthie about her feelings.