Early 1970s. The Americans and their allies have been fighting on Vietnamese soil for several years. Only thanks to the help of Soviet military specialists of the people's army is it possible to successfully resist the aggressor. The missile system, in which Captain Raevsky serves, protects the strategic bridge connecting the northern and southern provinces. All attempts by enemy aircraft to destroy the facility are unsuccessful. To break the resistance of the heroic calculation, the NATO rangers, enraged by the failures, decide to infiltrate the anti-aircraft gunners' position and steal the Soviet officers. On this night, Captain Raevsky and his comrades accomplished a real feat...