In Nazi-occupied Warsaw, teenage scouts Alek, Rudy, and Zośka risk their lives pulling down a swastika and hoisting the Polish flag atop the German “Zachęta” cultural center and then blowing up a mobile propaganda cinema.
The revue theater "Red Mill" is in crisis, the owner has no money to pay the salaries of the employees. When the bailiff hands the director an order to seize the theater's assets, an elegant gentleman engineer Fred Kampinos unexpectedly appears and offers his help.
The series centres around the investigations of Police Lieutenant Sławomir Borewicz. Each episode features a different case being solved by Borewicz.