Roberto, a 10-year-old boy, is drawn to music. An old organist discovers his gifts, and begins his musical education which will lead him to the head of an orchestra.

The local building-contractor Martin Roumagnac is fascinated by the fashionable Blanche Ferrand. To impress Blache, Martin presents her with a villa. However, this ruins him financially. Despite Martin's many efforts for the now femme-fatal Blanche, she is not able to chose between him and the rich consul De Laubry.

Jérôme owns a boat with his crook of an uncle, La Rose de la Mer. They sail with a band of crooks hired by the uncle to scuttle the ship and collect the insurance premium.

An untiring lady social worker, Émilienne, has as one of her charges a stableman who was wounded by his mistress. Unfortunately, Émilienne's young sister who was helping her at work decides to go away with the stableman.

In a small Provençal port, a young girl tries to divert a fisherman from his laborious life and his chaste loves.

A young man from Provence returns to the country after the ruin of his Parisian business. Thanks to his brave uncle from Arles, he finds his pretty cousin who never ceases to love him and who offers him her heart and her fortune.

A crazed scientist planning to rule the world decides to destroy the city of Paris with his lightning/ray gun.