Neglected Melville crime thriller isn't exactly good, but isn't bad either -- feels half-finished, more than anything. Crenna and Delon are friends; they're also on different sides of the law, with Delon a cop and Crenna secretly the head of a gang of thieves who specialize in risky heists. On the other hand, Delon is secretly carrying on with Catherine Denuve, Crenna's girlfriend. Plot too allusive for it's own good -- a bit more grounding of the characters are needed, since their motivations as it stands are opaque (why are Delon and Crenna friends? why is Delon carrying on with Deneuve? if Crenna knows, as he seems to, why is he allowing it? what does Denuve think of all this?). Low budget also hurts the movie -- the centerpiece of the film, an elaborate heist on board a moving train, looks phony and very cheap. (This is a rare movie that probably would benefit from a remake). On the other hand, Melville remains a master of gloomy atmosphere, the setpieces more or less work (the opening sequence, a bank robbery in a cold and rainy seaside town, is well done) and the actors all give it their best. Final shot of the movie is very well done.