Foreign intelligence agent Mirsayid, captured by Soviet border guards, is sentenced by a court to a maximum security prison. He manages to conceal the location of the cache where the map is stored. Soon, new agents, Loinab and Guliam, successfully cross the border. Their goal is simple: to visit Mirsayid in the colony, find out the location of the cache, and retrieve the hidden map. The Chekists give them complete freedom of action for the time being.

About Lenin's brother Alexander Ulyanov and his comrades' fight against the Russian autocracy.

Chekist Olga Anisimova, who infiltrated the White Guard center in Harbin, and border guard Aleksei Mogilov prevent a number of provocations on the Chinese Eastern Railway, uncovering a conspiracy between the White Chinese and the White Guard center in Harbin.

An ancient blade with diamonds is stolen from the museum where Alexei Gurov works as a restorer. Soon an old icon is stolen from Gurov's apartment. Head of the crime investigation is the police colonel Georgy Arefyev. Everyone knows that Gurov is obsessed with collecting rarities, so suspicion falls heavy on him.

April 1941. According to intelligence received by the Chekists, a fascist sabotage group plans to blow up one of Moscow's defense plants. To find out the plans of saboteurs working under the auspices of the German embassy, ​​the NKVD sends one of its best employees, Sergei Biryukov, to the plant. He finds contact with the fascist agent Keller and finds out that the explosion is scheduled for June 21...

A former officer of the Separate Border Guard Corps accepts an offer to head the customs service of the young Soviet state.

On instructions from Polish intelligence, a group of bandits dress up in Red Army uniforms and attack a Soviet border town.

The head of the border detachment Gamayun arrives in Turkestan to destroy the last large formation of the Basmachi - the gang of Mumin Bek.

Ukraine, 1920. Two White Guards are escaping from Red Army captivity - Vorontsov and Stronsky. They get to the monastery, where a White Guard detachment is hiding under the guise of monks. Vorontsov leads it and waits for a signal to move to the settlements occupied by the Red Army soldiers. He does not suspect that his friend, the “former journalist” Stronsky, is a security officer...

A film about Alexander Ulyanov (1866-1887), the organizer and leader of the “Terrorist Faction” of the Narodnaya Volya party, the older brother of Vladimir Lenin, participant in the preparation of the assassination attempt (03/01/1887) on Alexander III. Alexander Ulyanov was executed by hanging in the Shlisselburg fortress.