The Second World War. Leningrad was in blockade in the winter of 1941. The only way to deliver food and other supplies to the city is through the icy Lake Ladoga, the so-called “Road of Life”. The path itself passes through the ice of the lake. But the Nazis are preparing a diversion along the way, and their informant is most likely a truck driver. To deal with this situation entrusted to the captain of the NKVD Sergienko ....