As German forces advance toward Moscow, threatening the Soviet Union's very survival, the country places its hopes in the First Squad—a special unit of young people with supernatural abilities operating within Soviet intelligence. However, Nadya Ruslanova, the squad's sole remaining member, suffers from amnesia and is deemed unfit for combat. The looming Moment of Truth, an event occurring every seven hundred years capable of reshaping history based on a single person's decisions, is set to unfold on the Eastern Front. To break the stalemate, the Ahnenerbe, a mystical organization within the German military, plans to resurrect Baron von Wolff and his army of the undead. To prevent the Nazis from achieving global domination, Nadya must reassemble the First Squad, summoning her deceased teammates from beyond the grave to halt the impending invasion.