Courtesan, actress, medium—spy. Elza is content with her life in the demi-monde, in the glittering society of France's First Empire. But when her former lover is arrested for treason, Elza is blackmailed into informing on her friends and associates in a deadly game in which there are ultimately no winners. She has one alternative—to become the agent of the most feared man in Europe, Napoleon Bonaparte! From the theaters of Paris to the camps of the Grand Army, from the ballrooms and bedrooms to battlefields corporeal and astral, Elza must rely on her wits, her courage, her beauty, and her growing talents as a medium to survive—and to triumph!