The film's events unfold around a former Afghan-led, red-flagged "Santa". Yesterday's recruits become professional scouts and embark on a new mission. In the past, a businessman, a shooting champion, a chemist, a Zaporozhye locksmith and a volunteer from the Crimea become experienced fighters who know what war is and the pain of losing close friends. Information emerges about the possibility of a full-scale invasion of Russian troops and the preparation of a bloody terrorist attack in a frontline city that is being prepared by invaders. The Santa team enters the battle to prevent a terrible tragedy among the civilians and identify the "mole" - the organizer of the terrorist attack.