Four kids find a WWII battle tank on one of the historic battle sites. They start playing and - find themselves back in the time of war in the middle of a battle.

After starting learning in a technical school a young student Sergey Berendeev proves to everybody that he's a real inventor.

Real story of the young legendary actress of Soviet cinema Gulya Korolyova, who started acting in films at the age of four. In May 1942, having barely finished school, Gulya voluntarily went to the front and soon died heroically in a battle near Stalingrad.