Beautiful, aristocratic, an adored wife and young mother, Lady Windermere is a fascinating puritan who discovers that her husband may be having an affair with another woman. She confronts her husband but he instead invites the other woman, Mrs. Erlynne, to his wife's birthday ball. On the other hand Mrs. Erlynne has a secret - a secret Lady Windermere must never know if she is to retain her peace of mind.