Naive Midwesterner Mary Ann Singleton moves to San Francisco and takes up residence at the boarding house of bohemian landlady Anna Madrigal.

Edgar and Anna reminisce over the past, while Beauchamp seduces Mary Ann, who starts work at the Bay Area Crisis Switchboard.

DeDe and Mary Ann argue about Beauchamp while Anna's relationship with Edgar grows. Michael's parents see some shocking sights when they visit.

Norman and Mary Ann go trick or treating together and Michael hides his sexual orientation from his parents. Mona reconnects with an ex.

Mary Ann and Norman celebrate his birthday together, D'orothea and Mona struggle to connect, and Michael and Brian bond while out.

Mary Ann finally learns the truth about Norman and confides in Michael. A dying Edgar names DeDe's child, while Mona meets Mr Wilson.