A final episode in the trilogy about the Russian partisan's resistance during WWII. The film is set in 1944, when Russian partisans are making progress in their fighting against the Nazi occupation of Russia, Poland and Czechoslovakia. Lt. Colonel Mlynsky is now in charge of an international clandestine operation. He is the commander of the special group of partisan-fighters. Mlynsky is organizing the Russian, Polish and Czechoslovakian partisans to join forces for an attack behind the enemy lines.