Autumn 1941. German tank troops are making another attempt to break through to the Uritsk and Pulkovo Heights. During heavy fighting, Soviet troops managed to stop the offensive of fascist tanks one and a half kilometers south of the Pulkovo Observatory. The 900 days of the blockade and the incredible courage of the Soviet people were approaching ...

A story about the tragic events in the life of besieged Leningrad from September 1941 to January 1943.

"Iskra" is the codename for the plan of the operation of the Soviet troops to break the blockade of Leningrad. In January 1943, the blockade of Leningrad was broken. A corridor 8-11 km wide was formed between Lake Ladoga and the front line.

In June 1941, the Extraordinary Defense Headquarters of Leningrad, under the leadership of Zhdanov and Voroshilov, decided to build the Luga defensive line. Heavy fighting west of Pskov forced units of the front to withdraw, and on July 9, Pskov was also abandoned. The battles in the Luga direction held back the enemy. The first attacks of the Germans, intending to cross the Luga line on the move, were repulsed with heavy losses for them.

Based on the play of the same name by A. Galin, staged by the Central Academic Theatre of the Soviet Army. Konstantin Ivanovich Ermolayev, who had been driving locomotives for many years, was offered a dispatcher job due to his approaching retirement age. He refuses to accept this and goes to his wartime friend Pankratov for advice.