Professor Branck invented Fortuna a machine providing absolute luck, fortune and success, to whoever uses it, provided they are a virgin. Trying the experiment, Lucien Lepur, a street vendor who has never known a woman before, becomes the man of all successes. But he soon regrets Micheline his fiancée and finds himself under the influence of Professor Branck. Helped by Casimir, Micheline snatches Lucien from Professor Branck. Falling into her arms, Lucien loses all his powers but wins love.

Five unemployed workers win 100,000 Francs in the national lottery. Instead of sharing the money, they buy a ruin and build an open-air cafe. But difficulties come to split their friendly group apart.

The Duc de Latour-Maubert falls in love with an intriguer when he had better think about the business of the ruined family, by marrying a rich American!

A very rich businessman, knight of the Legion of Honor, bets that he can start his career from scratch. After all kinds of adventures, he climbs the ladder of society and, having become rich again, finds love and a new fortune.

A former typist at a bank ,having married her elegant young boss and gone on a honeymoon, needs to return to work when the bank runs into trouble, and is separated for a while from her new husband.

A widower sends his son Dédé to boarding school, falls in love with a young woman and gradually neglects the child, not out of disaffection but because of routine. The little boy is helpless: he feels he has been completely forsaken - Fortunately, things improve: Dédé ends up finding a new mummy.