The Algerian Hassi Messaoud, or Jean, as he is called by his shady friends, is a courier for a Parisian crime boss.
He's no criminal as such, but he grew up in those middles.
His cover is that of a taxi driver, and he in fact strongly prefers his legal job.
But he did the courier job anyway because nobody walks away from the "family".
However, one day, Jean really had enough.
He fled Paris and found employment as a private driver for a rich psychiatrist (played by Eric).
No need to say that his former business partners weren't too happy about this,
and Paris is now a very dangerous city to him.