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.

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

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

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

In the border zone of the Soviet-Polish state border, gangs of the Organization of Ukrainian Nationalists operated. Captain Olkhovik was given the task of infiltrating the OUN gang.

About the heroism of the border guards who took upon themselves the full brunt of the blow of the Nazi hordes on the first day of the Great Patriotic War.

A group of saboteurs was sent into Estonia in 1959. This group included a local resident who also has his own personal goal: to find the daughter he lost at the end of the war while fleeing abroad.

At the southern border outpost the Soviet border guards managed to neutralize a spy from one of the Western intelligence services and discover an electronic unit recording data about secret strategic military facilities located on the territory of the USSR.