The workers at the ironworks are working to fulfill a two-year plan. The spy group takes advantage of the bitterness of a disrespected innovator and tries to extract information from him about a new technology for pressing metal powder. However, their plans are thwarted by the vigilance and vigilance of the research staff from Department Z-8.
Josef Bek
as
Milica Kolofíková
as
Jiřina Petrovická
as
Karel Pavlík
as
Ladislav Boháč
as
Bohumil Machník
as
Jiřina Šejbalová
as
Jiří Dohnal
as
Miroslav Homola
as
Vojta Plachý-Tůma
as
Miloš Hájek
as
Emil Bolek
as
