April 1941. According to intelligence received by the Chekists, a fascist sabotage group plans to blow up one of Moscow's defense plants. To find out the plans of saboteurs working under the auspices of the German embassy, the NKVD sends one of its best employees, Sergei Biryukov, to the plant. He finds contact with the fascist agent Keller and finds out that the explosion is scheduled for June 21...
as Sergei Biryukov
as Sedoy
as Gromov
as Keller
as Franz Rediger
as Otto Breyer
as Stepanov
as Tanya
as Zina
as 'Gruzchik'
as Osipov
as Klava Ovcharova
as employee of the NKVD
as 'Gruzchik''s partner
as Kitri
as Basilio
as plant manager
as Ivanov
as personnel manager
as Matilda Gaponenko
as Schulenberg
as bookseller
