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.

The head of a gang of criminals in Arizona tries to kidnap a girl, but is hindered in his intentions by a handsome mining engineer and a federal sheriff.

The "Brigatte Veneno" is a fan group from the soccer club "AS Roma". The next match is against "Juventus Turin", the classic prestige duel. Principe, the former leader of the group, has been dismissed from jail a few days before. He has to realize that his best friend Red has not only taken over control of the group, but also has started an affair with his girlfriend. The rivalry between the hot-blooded Principe and the sensible Red causes an anxious mood within the group. When Smilzo, a member of the group, dies during a street fight with another fan group, Red knows that Principe is to be blamed for this catastrophe.