Spring of 1944. The war is nearing its end. Thousands of concentration camp inmates were brought to the Normandy coast to repair the defenses damaged by Allied aircraft. On one of the islands, a small group of prisoners, led by Colonel Zakharov, prepares an uprising. The course of events was accelerated by an action taken by French prisoners of war. They barricaded themselves in the bunker and were ready, sacrificing themselves, to undermine the fortress.

The film takes place in Europe in the 19th century. The film shows the popular uprisings that took place there, as well as the search for truth and the confrontation of Karl Marx and opponents of the revolution.

Borja and Seva live on the bank of the Dnieper. In summer, during vacations, they help adults by delivering letters. Suddenly they learn that a poacher has appeared in the village. The boys start their own investigation.