Jockey Jack has a bill open with a gangster just released from jail. He somehow manages to parry the gangster's knife attack backstage at a theatre and the latter ends up dead being put into a double bass case. A day later the gangster mysteriously has disappeared, but it turns out that he was carrying a bet ticket for a horse race now worth over a million. A turbulent run for the money begins.
Louis de Funès
Jacques, le cousin de Jérôme, dit « Jockey-Jack », petit truand
Michel Serrault
Jérôme Martinet, contrebassiste et comédien
Mireille Darc
Rockie « la Braise », femme entretenue
Francis Blanche
L'oncle Absalon, le savant farfelu
Maurice Biraud
Jo Arengeot, un petit truand sortant de prison
Darry Cowl
Gratiopoulos, le milliardaire à la soirée
Raymond Meunier
"La Douane", un complice de Jo
Hubert Deschamps
Le général Frédéric Cédille
