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 Berestovs, Elena and Sergei, are defeated in the European Figure Skating Championship and must change the program. Elena is unable to withstand the grueling new training. Sergei tries to find a new throwing partner, but realizes his mistake and must return to Elena.
Two 7th graders, a hooligan Mukhin and a good student Kronov do not like each other. They decide to have a peace day together, which changed their attitude both towards each other and towards the world around them...
