In the late 1980s, Moscow was shocked by a series of murders, with police finding only mutilated female bodies. Law enforcement agents can not deal independently with the investigation of this case. News of these acts quickly spread across the country - the arrival of the royal family in Moscow is in danger. It was then that a detective investigator Erast Petrovich Fandorin, who achieved certain professional successes in his business at such a young age, takes over the investigation. The provincial secretary of Aniasiy Tulips, for whom this business is a chance to prove himself in a favorable light, is taken to help Erast. The detectives are born an incredible and seemingly incredible version - Jack the Ripper visited Moscow, as bloody kisses were found on the girls' necks. The Ripper is also a personal threat to Fandorin, as the maniac is approaching his lover