Lady Windermere's Fan, the first of Wilde's social comedies, opened on February 20, 1892, in London to lukewarm reviews. A four-act play that employs what are often regarded in drama as cheap tricks-mistaken identity, the lost child restored to the rightful parent, the conversation overheard while hidden, and the romantic triangle-this play ultimately succeeds because it twists the cliches with which it is working. The mistaken identity remains mistaken, the lost child (Lady Windermere) never knows that Mrs. Erlynne is her true mother, and the romantic triangle is really not a romantic triangle, but only appears to be. The play revolves around Lady Windermere's twenty-first birthday. Her husband is giving a ball in honor of the occasion. Lady Windermere, trusting and innocent, receives information that "poor, dear Windermere" has been seeing another woman and has apparently set her up in style. At first, Lady Windermere does not believe the reports, but the seed of suspicion has been sown."