September 1942. The Battle of the Volga is in full swing. Soviet command learns that the Germans have begun testing a new weapon—combat lasers. A battalion specially sent to seize the secret weapon dies under strange circumstances. To clarify the situation, a reconnaissance group led by Lieutenant Ilyin is sent behind the front lines. The scout has no idea that at the most dangerous moment he’ll have to face a childhood friend who now commands a German sabotage unit…