Always there when you don't need it

In spite of their total inexperience, three suburban lascars launch themselves into close protection. Thanks to a "mythical plan", they are assigned to protect Marie Van Verten: a capricious and whimsical young woman, heiress of the biggest fortune in Belgium... And incidentally, a target for over-trained killers! Will our heroes' sense of improvisation be enough to get them out of trouble?