Duclos's son, a worldly gangster, is compromised in a case of which he is innocent. The proof of this innocence is in the hands of a "competitor", the Marquis de Chemantel de Beauvoiron, a misguided aristocrat. He asked for $ 10 million to cede the document. Duclos will then imagine Chemantel contracting $ 10 million in life insurance for his son. As he discovered in Rome a tramp, a look-alike of the marquis, he will bring this man to Paris and arrange for him to die accidentally.

Totòas Marchese Gastone de Chemantel / Chateau-Boiron / il vagabondo Totò
Sylva Koscinaas Juliette Marchand
Fernand Graveyas Il dottor Duclos
Philippe Clayas il finto maggiordomo
Paul Guersas Pierre, figlio di Duclos
Luigi Paveseas Calogero Tempesta
Peppino De Martinoas Il maître del night-club
Agostino Salviettias Custode del museo delle cere
Tiberio Mitrias Il gorilla