A film about the life and activities of the Polish revolutionary Ludwik Waryński. In his memoirs, Ludwik returns to his student years in St. Petersburg, to Warsaw, to Krakow, where he was arrested and put on trial. After the end of the process in Krakow, Waryński leaves for Geneva, where he meets with Russian revolutionaries. In 1881, he returned to his homeland and created the first party of workers in Poland...

"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.

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

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.