The film is set during World War II. After capturing the "trophy" Mercedes, a group of scouts, disguised as German officers commits a daring raid behind enemy lines (the 116th Motorized Division) on roads controlled by the enemy.
The Soviet command has alarming information about the new invention of the enemy. According to intelligence, the Nazis delivered a batch of new chemical shells filled with gas of tremendous destructive power to one of the sections of the Eastern Front. The Nazis want to test them in combat conditions, and then apply them on a large scale.
The ship repair plant's director is appointed to the post of the regional executive committee's chairman. He has his own point of view on the prospects for the Far Eastern region's development, and he will have to defend the ecological experiment to protect the unique nature of the region step by step...
