German forces in Yugoslavia set out to destroy the stronghold of Tito with a traitor's help, but are overcome by Partisan resistance.

A group of young illegals collect weapons in order to help partisans to liberate the occupied city of Belgrade.

The mother of a national hero Nikoletina Bursac leads an imaginary conversation with the statue of her deceased son. We follow events from Nikoletina's life and war: his joining of the partisans together with his neighbor Jovica Jez, meeting with the small Jewish girl Erna who survived the slaughter of her village, constant quarrels and friendship with commander Pirgo and commissar Zlatko, meeting with Curetak and their unsuccessful love relationship.