In Castallet, a village in Provence, cats are swarming and disturbing the peace and quiet of the inhabitants. The municipality decides to get rid of these invasive felines, but a group of children nicknamed "la bande à Bobo" (Bobo's gang) comes to their defense.

In Nice, the wealthy widow Betty Farnwell falls for the charms of a handsome young man, Philippe Delaroche. Mrs Farnwell is so taken with Philippe that she persuades her bank to allow him to manage her financial affairs. Philippe, an unscrupulous opportunist, is not slow to turn the situation to his advantage and within no time he is married to his wealthy benefactor. Philippe has barely grown accustomed to wearing a wedding ring when he begins a romantic liaison with his wife’s attractive secretary, Eva. It soon transpires that Eva is even more ruthless than Philippe.

In North Africa, an anguished husband tests the character of the doctor he believes is responsible for his wife’s death.

In order to please Martineau, a wealthy industrialist, cynical Gabory accepts to organize a rigged beauty contest whose winner will be Françoise, Martineau's young mistress. However, there are other comely contestants among whom Christiane, the daughter of a general, Jackie, an unemployed actress, Colette, the daughter of a distiller and Marie, a secretary engaged to serious-minded construction foreman Robert. So, will things turn out exactly the way Martineau and Gabory want them...?