""Tonight's story, The Code Of The Mulliners, is of Archibald, who had two great advantages in his life, his love for Aurelia Cammarleigh and his ability to imitate a hen laying an egg - the latter is being imitated at this very moment at the Drones Club in Dover Street."" Believing his mother to be insane, Archie Mulliner feels compelled to break off his engagement to Aurelia Cammarleigh. But a Mulliner never fails to honour a commitment, so he needs to find a way to get her to do the breaking up. Yvonne, an inventive actress, offers him a sure-fire plan...