On their way to Monte Carlo, Monaco, Marilyn and her husband, Neil, meet several other married couples, including Julian and Phoebe, who are traveling with a lost dog they plan to return to its wealthy owner for a large reward. But, when the dog's mistress is murdered, the travelers become the prime suspects, and Inspector Bonnard is determined to track them all down.
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.
Antonio La Quaglia becomes the railroader in Piovarolo during 1922 meanwhile the fascism is raising. Later he marries a jewish woman. He has career ambitions but can not reach them.
