The German armies, encircled near Moscow, are not going to surrender. The Luftwaffe supplies the troops in the Moscow Pocket with transport planes. To save Army Group Center, the Wehrmacht generals gather forces and prepare a chemical weapons unblocking strike. Under these circumstances, Lieutenant Colonel Nagulin receives orders to cut off the supply of the Germans through the "air bridge" created by Göring. While Nagulin hunts for transport Junkers, the Abwehr once again sets a trap for himself.