Eric and Ramzy are working as window washers at the Montparnasse skyscraper in Paris. Thinking that he has a date set up with beautiful executive Marie-Joelle (who in reality hates his guts), Ramzy stays at work late while Eric hangs around with him. As a result, the pair witness a gang of terrorists seize the tower and take its late-night occupants (including Marie- Joelle) hostage. Knowing that only they can save the day, Eric and Ramzy swing into action.

A young man is a collector of feminine conquests. One morning, leaving one of his mistresses he is addressed by one of his past flirts. As revenge, she denounces him later to the police as the murderer of her fiance who was found dead the same morning. With the help of his mistresses and some new ones he makes on the road, the young man goes in search of the man he thinks is the killer, then his blond consort with whom he fell in love at the first sight the evening before.