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...
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.
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...