In the small town of Kandalaksha, Petya lives out a fantasy life as a traffic cop. He has a holster, a wooden gun, and the locals humor him by following his "orders." When a convict escapes from a nearby prison, Petya joins the manhunt as any good officer would.

The scouts of Lieutenant Besfamilny's platoon receive a task - to check information about the Nazis' secret bunker. They successfully cross the front line, but then everything does not go as planned.

In a small town there are no mysteries, lively events or attractions, apart from the smooth tracks of the railway, which hide real life and fairytale emotions beyond the horizon. The train to the capital, which passes through the town every day, seems to Katya and Oxana to be part of a different world, full of wonder. One day an unexpected message from the Moscow express alters the routine life of the two friends.

Summer and autumn 1944. Odessa. The city, liberated by the Red Army from the German-Romanian occupation, begins a new lease of life. But, according to military intelligence, a network of Abwehr agents recruited from among the local population and professionally trained saboteurs remained in the city after the Nazis retreated. Now a special task force is being formed in Moscow consisting of members of SMERSH and the military prosecutor's office investigators, who will be sent to Odessa to strengthen the local authorities and the police. The group, under the command of SMERSH Captain Viktor Zvyaginov, includes two investigators from the military prosecutor's office, Svetlana Elagina and Ivan Rokotov, who not only find the trail of Abwehr agents, but simultaneously solve a number of criminal cases. Along with their professional military activities, the romance between Svetlana and Ivan, who lost each other during the Red Army's retreat from Kharkov in 1941, is rekindled when they are reunited after a long separation.