The beautiful Serbian Diva Madamoiselle Idiale is in Vienna for a grand performance, as is her lover, the British spy Bellamy. Louise Idiale is devoted to the cause of her people, the Serbs, giving them money and supporting their ambition to be free from Austro-Hungarian domination. Also meeting in Vienna are the Emperor of Germany, the Emperor of Austria, and the Czar of Russia to discuss a secret military alliance. By chance an American newspaperman comes into possession of a memorandum from the meeting. Before the novel ends it will change hands and bring many deaths...
