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...

The events that are crucial to the fate of the heroes take place during one night shift at one of the country's largest construction sites.

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.