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
Milica Kolofíková
Jiřina Petrovická
Karel Pavlík
Ladislav Boháč
Bohumil Machník
Jiřina Šejbalová
Jiří Dohnal
