On an otherwise normal day, Étienne, a happily married man and a good father, sees something that stops him dead in his tracks: a gorgeous woman in a billowing red dress. Long after she has left his vision, her memory continues to haunt his mind. He falls instantly in love with her and tries everything to get to know her better. Helping Étienne snare his elusive lady in red are his three bumbling buddies, which all have secret affairs and/or cheat on their wives.

This sex comedy concerns the efforts of Julien to get his timid, "backward" 20-year-old son to take an interest in sex and get married. After a series of adventures with women (arranged by papa), Valentin finally gets married to a woman who appears to be as shy as he is. Things get complicated when his father begins an affair with her.

The young and charming Mandoline, accountant of the advertising agency Publi-Pub, has stolen documents proving that the company kept double accounts. Remorseful when she wanted to pass this evidence to a tax inspector, she decides to put the documents back in the agency's safe, but does not really know how to go about it. Her friend Marie-Charlotte, a transvestite, helps him find a young safe-drilling man in his condition, who will help him open the safe - but of course, the matter is not so simple.

L'Alpagueur is a free-lance spy from the French secret agency. He's put on the investigation about L'epervier, a serial-killer who employs young boys to help him robbing banks before killing them.