
The fake private detective Mike Spillone is hired by two old ladies to find out if Brigitte, the wife of their nephew Otello Bellomo, has a lover. Brigitte is a physician but the two aunts are unaware of the fact. While investigating, Mike and his assistant Johnny discover Brigitte with a prospective patient, the marquis De Vitti who was shot by the husband of the woman he tried to seduce. Afterwards Spillone finds her with her husband who he believes to be her lover.

as Michele Spillone detto Mike

as Marchese Vittorio De Vittti

as Dottoressa Brigitte Baker

as Madre del marchese De Vitti

as Avvocato Otello Bellomo

as Gennaro

as Professor Elia Vagoni

as Il maître della 'Conchiglia'

as Caterina

as Cameriere

as Romeo

as Capo dell'agenzia investigativa

as Ida

as infermiera

as Zia Ada Barbalunga

as Self

as Egisto

as Il signore al comizio (uncredited)