This show is supposed to take place in Marseilles. Well. You won't see anything of it, not a single known place, nothing. You won't hear no one speaking with the typical local accent. So, if it would be the dullest place in France, it wouldn't make any difference. But as the series itself is dull, it's alright...
Caïn is an egocentric who lost the use of his legs by his own fault. That makes him bitter and cynical. But he still feels he is a hero.
The main characters--that is the police force--are all poorly developed, and they all have a dark past; the plots are ludicrous and always very predictable.
The series begin with the warning that it is not suited for persons under 10 years of age. I strongly believe that this is a mistake: in fact, the warning should be that the series it is not suited for persons over 10 years of age. Simply because the whole show is an insult to the viewer intelligence.
This maybe the worst series I ever watch on French TV.