Soldiers of the Russian-Mongolian Joint Special Detachment, who are carrying out a special mission, went to the front line of the war and assumed the responsibility of conducting a sharp emotional and ideological battle with words and sounds. Therefore, the contribution of these people in the battle of Khalkh River was huge. This film shows the Khalkh River War and its scope through the actions of the "Little Squad" and the thoughts of its heroes.

About the events of the final stage of the Second World War — the defeat by Soviet and Mongolian troops of the selected Kwantung army. Bacteriological weapons were created in the laboratory of Japanese General Ishii Shiro. Experiments were conducted on prisoners of war and political prisoners. Epidemiologist Dmitry Sokolov was assigned to solve the mystery of this laboratory. At the cost of his own life, he completed the task. The march of Soviet and Mongolian formations through the Gobi sands and the Khingan spurs was not only a brilliant military operation, but also a warning of the use of bacteriological weapons by Japan.

In 1939, when the Japanese army invaded the protected border of our country, our border warriors showed how they protected the protected border of our country from foreign invaders.