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.

Ernest Krakenkrick and Bachir Bouzouk are about to become pilots in the French army. But after the bad consequences of a test undertaken with the centrifuge, they are forced to give up their dream. They are eventually given the position of baggage handler at Orly-West Airport in Paris. But one night, there is a hostage-taking in the airport and the "Moustachious", a group of terrorists, take hold of the control tower.