Georgiy Yumatov
Sergei Biryukov
Soviet counterintelligence receives information about the Nazis' intentions to infiltrate Moscow and sabotage a strategically important military plant. Sergei Biryukov, an experienced and brave NKVD agent, receives the task of establishing contact with the German spy Keller and finding out the date of this dangerous operation.
Sergei Biryukov
Sedoy
Gromov
Keller
Franz Rediger
Otto Breyer
Stepanov
Tanya
Zina
'Gruzchik'
Osipov
Klava Ovcharova
employee of the NKVD
'Gruzchik''s partner
Kitri
Basilio
plant manager
Ivanov
personnel manager
Matilda Gaponenko
Director
