Overview

Lady Windermere, still believing the worst of her husband, is tempted by the amorous advances of the debonair Lord Darlington and agrees to visit him at his flat. Mrs Erlynne, learning of this before Lord Windermere, rushes to Darlington's flat to prevent her daughter from committing a destructive folly similar to that which she herself committed twenty years earlier. Without letting Lady Windermere know that they are mother and daughter, Mrs Erlynne persuades her that a liaison with Lord Darlington would be disastrous, but before they can leave, Lord Windermere arrives. The ladies conceal themselves, but Lord Windermere discovers the fan that he has recently given his wife as a birthday present and demands to know if Lord Darlington has Lady Windermere in his rooms. To prevent the exposure of Lady Windermere, Mrs Erlynne enters, saying that it is she who is under Lord Darlington's roof and must have picked up Lady Windermere's fan by mistake.

Lady Windermere's reputation is saved, but Mrs Erlynne's is compromised. Fortunately, her admirer, Lord Augustus Lorton, is convinced of her honour and proposes marriage. The Windermeres are reconciled, and all ends happily. Lady Windermere never learns that Mrs Erlynne is her mother.