In 1942, as the German-Soviet War intensified, the daily life of Serafima, a girl living in a farming village near Moscow, suddenly collapsed. Her fellow villagers and her mother were brutally murdered by the raiding German army. Just moments before she herself was to be shot, Serafima was rescued by Irina, a female Red Army soldier. To defeat the enemy who took her mother away, Serafima undergoes rigorous training with her comrades to become a first-class sniper——The whereabouts of the endless struggle of girls burning with the desire to strike down their foes.