A magician is hired by a rather comical and idiotic Duke to entertain some guests one evening at his estate. The Duke's arrogant nephew is determined to expose all the magician's tricks. One trick he cannot explain, it nearly drives him mad. A skeptical doctor and a less skeptical clergyman are also among the guests. Meanwhile, the magician and the Duke's niece fall in love. TV adaptation of Chesterton's 1913 stage play