In 1942, as the German-Soviet War intensified, the daily life of Serafima, a girl living in a village near Moscow, suddenly collapsed. German troops launched a surprise attack, brutally slaughtering the villagers and her mother. Just moments before she herself was shot, Serafima was saved by Irina, a female soldier of the Red Army. To defeat the enemy who took her mother and others, Serafima trains relentlessly with her comrades to become elite snipers—a relentless struggle driven by the burning desire to avenge their fallen.