1941. Nazi troops are advancing rapidly, and the front line is moving further and further east. The war tests the strength of spirit of everyone who comes across it.

Four Soviet soldiers in a pillbox find themselves deep in the German rear. Instead of 10 men, the pillbox is manned by Captain Leonov, Petty Officer Kivsh, who did not make it to the fleet, and two “yellow jacket” soldiers. In the face of a constant lack of resources, they try to hold off the German attack to the last. The situation is aggravated when our plane is shot down near the pillbox and a general is among the survivors. Now the Germans won't give up until they get hold of the secret data.