In the novel 'The Bomb-Makers' by William Le Queux, readers are transported to a world of espionage and intrigue, where even the most innocent-looking people could be harboring dark secrets. The story begins in a dingy restaurant in Soho, where Theodore Drost and his friend Ernst Ortmann are discussing the danger posed by Theodore's daughter Ella. As a rising star in London's revue scene, Ella has unwittingly become involved with a group of bomb-makers with ties to Germany. Can Theodore and Ernst stop her before it's too late?