This movie tells a true story about events in Zagreb in 1941. Nazis and their collaborators organized the great gathering of students on Dubrava stadium. The intention was to publicly separate Jews from them which would lead to future pogrom. The event, however, took an unexpected turn.

The parents of a two boys remarried after divorce. The older one stayed with his father and his attractive young wife, while the younger one stayed with the mother and her new husband. On Sundays, the two boys visit the other family alternately, and the younger Djuro will soon realize that they have much more in common.

In order to check the German offensive, Partizans send an elite team of explosive experts to blow up a strategically important bridge. Besides being heavily guarded, that bridge is almost indestructible and the only man who knows weak spots in the construction is the architect who built it. He is, however, reluctant to cooperate because he doesn't want to see his masterpiece destroyed.