Two twin sisters, nieces of the mayor of Buissons-les-Amours, are, one very wise, the other evaporated. The lover of the second falls in love with the first whom he will marry after being forgiven for his conduct.

Frédérique, married to a brutal and vile being who dies tragically during a duel with the trident, falls in love with Jean, the fiancé of her younger sister Margarido. Both fight against their passion, to see it finally flourish because, to ensure their happiness, Margarido who has guessed everything, does not hesitate to sacrifice himself.

Being a tramp is not always a disadvantage. For example when there is a masquerade ball. Indeed wearing flea-ridden rags might just mean having donned a costume. This is what happens to two resourceful Brussels bums, La Cloche and Picolard, who manage to gain entry in a fancy-dress ball. Once there, La Cloche is mistaken by an oriental prince for a respected doctor. His mission will be to give care to a music-hall diva. Even more exciting, he is asked to vaccinate a whole troupe of showgirls. Trouble guaranteed.

Robert Bernier murdered his brother with the complicity of a worker. The only witness to the tragedy, Veronique was injured while rescuing her boss and remains blind. Later, cured by an operation, she denounces the criminal whose voice she recognized and who had taken over the factory.

The very height of the patriotic film, including authentic footage, about the background and distribution of the Belgian newspaper 'La Libre Belgique' during WOI and Gabrielle Petit's part in the resistance movement, her heroism and stoicism being strongly emphasized. The narrative on the espionage activities is rather fragmented. 'La Libre Belgique' focusses mainly on the distribution and the final prosecution of Gabrielle Petit.