A female commissar is sent to the naval detachment, led by the anarchist Vozhak, on behalf of the Party Central Committee. She is tasked with subordinating the sailors to the cause of the revolution.

A former front-line soldier, who worked at his post for a quarter of a century, local commissioner Lieutenant Semyon Mitrofanovich Kovalev, going to the department in the morning, was most sad that tomorrow he would no longer have to go to service: tomorrow he would be retired. But the last day of his service ended tragically.

In the spring of 1961, KGB officers received information that an experienced intelligence officer Mikhail Zarokov, son of the Russian emigrant Count Tulyev, with extensive international experience and knowledge in various operations was abandoned on the territory of the Soviet Union. He is sent to Russia to carry out a very difficult and risky task, which is directly related to the nuclear industrial complex and transfer the collected information abroad...