About the book: 2018 / The corpses of two young girls were discovered in a city park with an interval of several days. The cause of their death was an artificially induced heart pathology. Colonels of the Ministry of Internal Affairs Gurov and Kryachko assume that they are dealing with a deliberate murder. But who could commit such a sophisticated crime? Detectives study the surroundings of the dead and go to a medical center that is secretly engaged in the study of rare heart diseases. Gurov begins to get acquainted with his activities and comes to a terrible conclusion: the murdered girls are not the last victims of the bloody series…