Kyiv, our days. A series of crimes, cruel and particularly cynical. Investigators for Particularly Important Cases, Major Aransky, and his young assistant, Lieutenant Kordybaka, are assigned to investigate the murders. The path to the truth is confusing and difficult, sometimes it seems insurmountable, but they will go through it, find that thin thread, by pulling which they can unwind the whole tangle of criminal intricacies, otherwise it is impossible - evil must be punished. All characters and events in the novel are fictitious.