Imagine your home is bombed one Sunday afternoon by a horde of enemy planes. Imagine your family has gone and you are left behind. This is the fate of five-year-old Peter and two teenagers Yuri and Tanya.

Imagine being ordered to leave school to fight the terrifying Nazis in WWII. Imagine you are right in the middle of a battle; it's you or them – you have no choice. This is the fate of Vlad and his three classmates.

The battlefield is the city of Stalingrad, the pride of Russia. Germany's Adolf Hitler wants the city badly, but Josef Stalin refuses to let go.

Nobody has managed to stop the triumphant Nazi invasion across Europe. It all depends on one city – Stalingrad – her citizens, her soldiers and her children.