1944. According to information obtained from a recruited German agent, a major act of sabotage is being planned in the Murmansk port, through which the USSR receives vital military cargo from the allies along the northern route. Counterintelligence officers Sergey Saburov and Elena Soley have a new dangerous mission, to prevent large-scale sabotage in the Murmansk seaport, find and neutralize the enemy.
1942, Great Patriotic War. Returning from a mission, experienced snipers brothers Alexey and Yegor Broshin encounter the German high-class sniper Wengler. As a result of the duel, Yegor dies, and Alexey is seriously wounded and ends up in the hospital. Having barely recovered, he rushes to the front, but the medical board declares him unfit. Instead of returning to the front line, the command entrusts Alexey with an unusual task - to teach young female cadets how to be a sniper. Alexey undertakes to train his players harshly, sometimes even cruelly.