Leon de Paris used to be a modest dog groomer in Paris. In search of more satisfaction. Thanks to the financial help of Fanny (his terrible mother-in-law of his), he manages to set up an elegant "Coiffeur pour homme" in Rome. But because of this, his life with Fanny is not fun, and moreover, Leon has to hide his homosexuality for work reasons. He decides to stop this nightmare by hiring "Er Cuculo" (the cuckoo) a B gangster to simulate a robbery. In fact, the plan is to take all of Fanny's money, share it between them, and escape in Monte Carlo. Will the odd couple make it?