Pierre Still

Gaston wants more than anything to marry the naive Simone. But where he is, there is Sidonie, a local singer romantically pursued by the police commissionaire.

Eugène, who works for Radio-Europe, is a bit dim-witted. He lives in a block of flats whose caretaker is Madame Motte, and the lady is in love with the young man. Just for laughs, Eugène's friends circulate on the air the rumor that Eugène has inherited millions of francs. It does not take long before a swarm of 'friends' start mixing with him. After a while, considering that the joke has lasted long enough, the jokers reveal the truth. Eugène immediately loses all his 'friends' but not he girl he loves. Even better, Eugène actually inherits a big sum of money. He who laughs last laughs best!

Clodo, a gentle mongrel dog, isn't having much luck. His shaggy appearance has earned him the name of hobo. Often scolded by his Parisian masters for being a nuisance, his only consolation is Cathy, his youngest daughter. Unfortunately, she can't stop her parents from abandoning Clodo at vacation time. Fabien, a young farmer, takes the dog in, despite the hostility of his family. Fabien is secretly in love with his childhood friend, Arlène, "la demoiselle du château", who has left to study in Paris. But she returns home after a disappointment. Their relationship resumes.

A police brigade and a financial brigade are sent to Switzerland to dismantle a banking sector.