A company of carefree guys, passionate about computer shooting games, penetrates into a private laboratory where a simulator of military operations is being developed. Entering it, they find themselves in a world where the environment and what is happening are indistinguishable from real life. The guys manage to boot into the "closed level" unfinished by the developers, where Belarus of 1942, occupied by the Nazis, is modeled. There the guys face to face with a real, not a computer war.