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!