Pierre Cohen, a sophisticated Parisian psychologist, goes to his brother's farm in order to protect it from very hostile local landowners.

Malisard is a reporter at "Soir de Paris", his colleague Prévot is a photographer. Together, they roam the streets of Paris.

In an elevator, a group of young people are in conversation...

The play is set in Brussels, where Suzanne Beulemans, daughter of a wealthy brewer, is promised in marriage to Séraphin Meulemeester, son of a rival brewer. Both the young man and his father appear particularly motivated by the young bride's dowry. But Séraphin has a rival in the form of Albert Delpierre, a young Parisian intern at the Beulemans brewery, who is secretly in love with the young woman.