Éric and Ramzy are working as window washers at the Montparnasse skyscraper in Paris. Eric thinks that he has a date with beautiful Marie-Joëlle (real name is Stéphanie Lanceval), They stay at work late, but a gang of terrorists seize the tower and take its late-night occupants (including Marie-Joëlle) hostage. Knowing that only they can save the day, Éric and Ramzy swing into action.