The series "Ladoga" is a war drama set in the besieged city of Leningrad. In the harsh winter of 1942, the only salvation for the city is the Road of Life - a narrow and dangerous path to freedom across Lake Ladoga. However, Soviet counterintelligence discovers that this road will soon be sabotaged and possibly permanently cut off for the people of Leningrad. The traitor must be found among their own, and one of the drivers of the "polutorka" trucks could be the one. Captain Sergienko of the NKVD must uncover the identity of the saboteur.