Bruno Fioretti, known as "Mandrake", is an inveterate gambler who never misses a day at the horse racing track in Rome. He is doubly unlucky: he bets too much on one horse, and his wife is sleeping with his best friend because Mandrake is always at the track. Penniless and cuckolded, Mandrake decides to make one last bet.

Gigi Proiettias Bruno "Mandrake" Fioretti
Enrico Montesanoas Armando "Er Pomata" Pellicci
Catherine Spaakas Gabriella
Mario Carotenutoas De Marchis
Francesco De Rosaas Felice Roversi
Maria Teresa Albanias Fortune-teller
Gigi Ballistaas Count Dallara
Adolfo Celias President of the Court
Ennio Antonellias Otello "Manzotin" Rinaldi