Dima Vasilev, the son of KGB General Rostovskiy, is being trained for prestigious and dangerous work abroad. However, after an accidental offense, he is sent to Leningrad, where he encounters the routine of service in the form of surveillance of foreign citizens and at some point begins to doubt whether he has chosen the right path. Pasha Ivanov is a demobilized border guard. Having neutralized a dangerous gang that robbed savings banks, he receives an invitation to serve in the Leningrad KGB and begins to provide personal security for the city's top officials. Volodya Naumov, after completing KGB courses, goes to the city on the Neva to see his beloved, who has been assigned to Lenfilm. There, he will have to work on preventing ideological sabotage and terrorist attacks.
