There is an opinion that if the Earth is threatened by an alien invasion, then humanity will not last even a few hours. You can argue with this statement, or you can agree with it. Some argue that representatives of extraterrestrial civilizations are exclusively humane and do not know what war is. Others suggest that no aliens exist and never have existed. Still others, in all seriousness, believe that representatives of another mind have been living among us for a long time. So who is right? Whose opinion is true? Grigory Mezentsev loved asking such questions since childhood, but, frankly speaking, he did not hope that he would ever receive reliable answers to them. However, the events of a year ago turned his life upside down. And that was just the tip of the iceberg. The next task for Mezentsev and Kondratiev has every prospect of turning from very difficult to impossible. Comrades in arms will have to use all their skills and abilities to stay alive and win, because the forces of the world behind the scenes, who prefer to always and everywhere remain in the shadows, are ready to do anything to keep their dark secrets intact.