The Battle of Stalingrad turned the tide of the Great Patriotic War. Soviet forces are preparing for a large-scale operation to liberate the Belarusian Republic. In these conditions, intelligence reports a dire situation in the strategically important city of N. The occupiers have mined all the approaches, and in the event of their defeat, they are ready to blow up the entire city, practically to the last building. In order to disrupt the Nazis' plans, it is necessary to obtain a map showing the locations of the bombs and, if possible, try to disarm them. But who is willing to undertake such a dangerous mission behind enemy lines? The professional saboteurs from the NKVD do not satisfy the frontline scouts. Experienced Captain Tishkov wants to go to the city of N with his former comrades from the circus troupe, who excel in agility, strength, and camouflage-makeup skills.