In the end of 1941. Gestapo formed the first concentration camp in Yugoslavia - Lager Nis. Political prisoners, hostages, Jews and caught sick Partisans are held in it.

The destiny of Zoric family from Nis, father and son, makes the basic story, and events which occur in camp room No. 12, called the death room, are in the first plan. While the Germans shoot people day and night, escape is being prepared feverishly inside the camp.

Of 145 prisoners, more than 100 managed to escape. It was one of the first mass-escapes from the concentration camps spread all over Europe.