Charles Vigne, a wealthy banker, frees Abdul, a good genius imprisoned in a vase. To thank him, Abdul grants his wish: to become a child again, while retaining the experience he has acquired. But the "disappearance" of the banker panics the financial markets and has disastrous consequences for the bank. Eventually, Charles Vigne will ask Abdul to give him back his real age.

Jules Berry
Charles Vigne

Suzet Maïs
Mathilde Vigne

Jean Tissier
Gégène

Saturnin Fabre
Abdul

Paul Azaïs
Paulo

Sinoël
Gédéon
René Alié
Christian Argentin
Vilmotte
Claude Bertin
Charles Vigne junior
Lucien Blondeau
Antique dealer
Félix Clody

Max Dalban
'P'tit Louis'
Olivier Darrieux
Bandit
Philippe Dehesdin
Monique Dubois
Yvette