Autumn 1941. Miraculously escaping from the Kiev boiler, investigators from the military prosecutor's office Rokotov, Mirsky and Elagina arrive in Kharkov, where evacuation is already in full swing. They have in their hands important information about the activities of the German espionage organization. New circumstances force them to linger in Kharkov. Indeed, together with the enterprises being evacuated, under the guise of refugees, further groups of German saboteurs are moving further east, whose purpose is sabotage and sabotage at military factories. Trying to open the channels for transporting scouts to the Soviet rear, Rokotov and Elagina find out that the organization operating in Kharkov is directly related to the Kiev group that they discovered a few hours before the city was surrendered. And the curator of both of these groups occupies a high post in the Main Military Prosecutor's Office.

Lucy Ermakova works as a waitress in the officer's dining room of the flight garrison. Her son Valka dreams that he had a dad, and always a pilot. Lieutenant Colonel Ivchenko requires Lucy favor, because he helped her with the work, but the woman avoids it. She likes the catcher major. Once Valka runs away to the airfield and disappears. On searches of the child raise the whole garrison…

A series about the events of 1943, when, after the devastating events near Stalingrad, German troops are preparing for revenge. A Soviet landing group was thrown into the territory occupied by German troops. The combat mission of the deceased reconnaissance group was to reconnoiter the plans of the impending German counteroffensive, which was supposed to come either from Belarus or from the Kursk direction.