The film is about dramatic revolutionary events happened in 1918 in Baku.

A first part of story about a Soviet spies trying to infiltrate German Intelligence center "Saturn" during and after the WWII.

A second part of story about a Soviet spies trying to infiltrate German Intelligence center "Saturn" during and after the WWII.

The Nazis planted explosives to blow up the cities of Krakow and Prague, but the underground resistance in Poland works with the Russians to stop the disaster.

The action unfolds in the last months of the WWII in Germany. Major Lubentsova meets a military doctor Tanya Koltsova, with whom once, in 1941, they once got out of the encirclement together. After that, their paths diverged. But in April 1945, during the forcing of the Oder, they found themselves together again.