I watched this movie for Lambert Wilson ,who was perfectly cast as a blind killer ;in his very first scene,he steals the show from his listless co-star Gamblin.
The screenplay ,as the precedent user wrote ,is ,except for the character of Wilson ,very derivative ;in the cast and credits ,the line "based on an idea by Luc Besson " did not bode well , to my eyes at least (it's one of his brilliant ideas which spawned the three dreadful "transporters").
Apart from Wilson ,best performance comes from Raoul ,the dog ,as faithful as Milou (Snowy);on the minus side ,an unbearable scene when sonny's friend comes out with the worst post-May 68 clichés about the police.
Wilson 's performance is perhaps worth a watch;but as far as he is concerned,you will be better off with "Des Hommes Et Des Dieux"