No one knows her real name, no one knows her face. But she is very popular, and even the most powerful people fear her. And it’s all because her professional interest is the marital infidelities of the country’s leading politicians. Anyone who does business through a keyhole and a hidden camera must be ready for serious trouble. Yet nobody believes the murder that an anonymous tip sent to the Moscow Criminal Investigation Department warns about—neither senior detective officer Vasily Konovalov of the Homicide Investigation Department, nor his adventurous companion, journalist Alexandra Mitina. And that’s a mistake!