Forensic investigators use modern science to solve the mystery of the missing Romanov family.
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.
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...
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.
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...