The movie is set in Belarus, where a team of counter-intelligence officers is given only three days to find a German radio operator posing as a Soviet soldier, behind soviet lines, on the eve of a major offensive.
A large-scale military operation is being prepared to find and destroy the enemy spy group, which will nullify all previous search sorties. The counterintelligence captain cannot allow the death of enemies without learning their true goals. He exposes himself and his officers in order to find the instigator and expose the entire network.—Tango Papa