Louis Malle directed this light comedy about crime and class in the City of Light. Georges Randal (Jean-Paul Belmondo) is a young man living in Paris at the turn of the century who is due to inherit a considerable fortune. However, his uncle, who is acting as his guardian, manages to spend Georges' money before he ever gets a chance to see it. Georges is also deeply in love with Charlotte (Geneviève Bujold), his cousin, and wants to marry her; however, the same uncle has promised her hand to another, a man Charlotte does not love. Understandably angry, Georges makes plans to steal the family's jewelry, intended for Charlotte, away from his dishonest uncle. Georges soon discovers that he enjoys being a thief, and begins robbing the wealthy as protest against the bourgeoisie. However, as Georges' ill-gotten nest egg grows, he finds himself becoming a member of the idle rich he professes to despise.
by Mark Deming synopsis