Two secretaries go out on a double date, but the inexperienced Mary flees when offered money for sexual favors. She takes refuge in a cafe and encounters a plebeian Prince Charming. The film recounts the simple progress of their romance after they go home together.
After an attack against the guard of the Third Reich, Nazi repression intensifies, and the Czechoslovakian resistance's organized sabotage in an aircraft factory leads to Gestapo shootings.