
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.
Genres:

Totò as Michele Spillone detto Mike

Vittorio De Sica as Marchese Vittorio De Vittti

Abbe Lane as Dottoressa Brigitte Baker

Titina De Filippo as Madre del marchese De Vitti

Germán Cobos as Avvocato Otello Bellomo

Agostino Salvietti as Gennaro

Rafael Bardem as Professor Elia Vagoni

Franco Coop as Il maître della 'Conchiglia'

Fulvia Franco as Caterina

Dante Maggio as Cameriere

Pierre Mondy as Romeo

Luigi Pavese as Capo dell'agenzia investigativa

Amelia Perrella as Ida

Benedetta Rutili as infermiera

Tecla Scarano as Zia Ada Barbalunga

Teddy Reno as Self

Darry Cowl as Egisto

Arturo Bragaglia as Il signore al comizio (uncredited)
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