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.

Sarajevo 1944. The German armies desperately need fuel in the retreat. Walter, the enigmatic and charismatic leader of the resistance movement, can endanger their supplies. The Germans are taking a cunning plan to remove that obstacle.