The Bodyguard.

The 1970s, USSR. Experienced bodyguard and KGB officer Pavel Selikhov fails to prevent the theft of a unique diamond from the dacha of a high-ranking official. Investigating this strange case leads Pavel to a deeply conspiratorial criminal network, the threads of which stretch to the very top. The further he goes in his search, the more strange deaths and unexpected events occur around him. The bodyguard has learned too much and must be eliminated, but Selikhov will not become a pawn in the dirty game of those in power.