The enemy is cunning and cold-blooded, armed with logic, persistence, and precise calculation. He is sure he knows how to achieve victory. However, he underestimates Soviet counterintelligence professionals—people ready to take risks and demonstrate unbending will.
In the early 1980s, Soviet counterintelligence receives information about the appearance of saboteurs in Crimea. KGB major Mikhail Koltsov is convinced that the enemy needs information about the secret military “Object-220” on the peninsula. One of the suspects becomes the scientist Rodion Beletsky, who worked at that facility. His behavior seems suspicious, and in his desk they find a large sum of money. In the end, Beletsky commits suicide by throwing himself off a cliff into the water. But Major Koltsov suspects that this is only a cover for the operation’s main goal—and the decisive clash with the enemy is still ahead.