April 1980. One day, KGB Major Vadim Shalamov suddenly disappears. On the weekend, the Shalamovs were going to the country, after that no one saw them. On Monday, neither the major nor his wife showed up for work, and their four-year-old daughter did not come to kindergarten. Neighbors and friends can't explain anything. Shortly before that, the operative participated in an operation to expose a spy in the field of electronic intelligence. Perhaps this has something to do with his disappearance... Shalamov is on the All-Union wanted list. Major Alexey Kostrov is engaged in the search. He feels like he's on the trail of a missing colleague. But the series of events that followed forced Kostrov to change the direction of his search.…

The enemy is smart and cold-blooded. He has logic, perseverance and precise calculation in his arsenal. He's sure he knows how to beat us in this fight. But the enemy does not take into account one thing: super professionals in their field, people of risk, honor and indomitable will — Soviet counterintelligence officers - stand in his way.