Clara et les méchants (1958)

A rich kid ,the daughter of an oil tycoon ,lives a life of luxury with private tutors and porridge and kipper for breakfast ;dad is busy caring about his big business -we never see him- and mom is a socialite ,who puts her dearest girl to bed before enjoying a society party.Bad guys kidnap the heiress ,to get a hefty ransom ;of course all of them are two-bit gangsters and pretty soon the little silly goose leads her kidnappers by the nose. .