Michel, a writer of detective novels, is married to Pat, a pretty woman he's been neglecting. One day, the results of a private investigation reveal that his wife is cheating on him. But he'd never contacted a private detective before. The facts are all the more disturbing in that they coincide with the detective story he is writing with his beautiful young secretary. Pat is murdered and found next to her dying lover, who is said to have attempted suicide. But the police soon realize that this is a double murder. The investigation develops; Michel is strongly suspected, as many presumptions seem to weigh heavily on him. The outcome of the investigation brings a surprise that clears Michel's name.

1964 film by Sergio Gobbi

A Parisian reporter tries to exonerate a fugitive neighbor of charges he murdered his wife.

Andrea Artusi is a successful businessman with a beautiful wife, Maria, and a happy marriage - until he has an affair. After his own cheating, he starts to become obsessed with his wife's fidelity. Since she is one of the most desired women in town, he worries that it would be very easy for her to cheat on him. Now every time a man looks at his wife, Andrea goes crazy. Meanwhile, Maria finds out about her husband's affair and decides to plan her revenge.

A skirt-chasing fashion photographer meets a charming young woman who captures his interest immediately. She is not wholly forthcoming, but after a period of time, he realizes that he is in love with her -- she is not just another conquest. It takes awhile before he also realizes that she is the partner of his femme associate who is possessive, at the very least.

A bank clerk is drawn into the risky world of a gorgeous gambling addict.