The story follows two men, Baron Leopold von Ragastein and Captain Everard Dominey, who are identical in appearance. The Baron is a German spy, while Dominey is an Englishman who has been living in Africa for many years. When the Baron is sent to England to spy on the country, he decides to use Dominey's identity to gain access to the upper echelons of British society. He quickly becomes a popular figure in London, and is soon accepted into the inner circle of the British government. Meanwhile, Dominey is sent to Germany to spy on the Kaiser. He is able to gain access to the Kaiser's inner circle, and discovers a plot to launch a surprise attack on England. The two men must now race against time to prevent the attack and save England from destruction. Along the way, they must also confront their own inner demons and come to terms with their true identities.
By E. Phillips Oppenheim · First published 1920 · Genre: Thriller, Historical Fiction, Adventure · 29 chapters