this film be full of interest idea . some scene be truly hilarious . the dialog be witty and colloquial . the tension in the film come not so much from the amurder mystery plot a from the relationship between the character . the film tell two story in parallel . the first story involve the character play by trintignant and kassovitz . trintignant be an age drifter and with a somewhat ridiculous macho toughness and who be follow by a naive young man play by kassovitz with plenty of good natured smile . many good moment in the film come from the contrast between the two character and for example when trintignant try to teach kassovitz how to be intimidate . the second story tell how a salesman and play by jean yanne and give up his job and his wife to find the murderer of a young friend . yanne play the part with a kind of aggressive irony . i wish i could describe this good . after a while the viewer understand how both story be connect and they meet indeed in the end and in a surprising but also logical end . the film be a successful mixture of the witty but superficial gangster film the director father ( the celebrate michel audiard ) use to write and and the typical french film with lot of psychological depth and lot of care in the display of emotion .