The hero is what the title suggests, a man who can't stop gambling, moving from one late-night backroom poker-game to another,betting most of his money on horse-races, leaving his diet to a throw of the dice; he even has a fruit machine in his well-appointed flat, where his art collection seems to consist of framed carpet. Yet, ironically, he is a methodical man, keeping to the same routine, the same hours, one night losing a fortune, another making one. Gambling is his only vice now; formerly a con, he did time 20 years previously for a failed bank job - he now considers himself too old for the criminal grind.

 

After one particularly unprofitable spree, and a chance conversation with a pimp-turned-croupier, Bob and an old friend decide to rob the casino safe at Deauville, and begin rounding up the usual experts and investors, minutely orchestrating the heist. Almost immediately the plans fall through-the dissatisfied wife of the inside man informs the police as does a thug Bob once refused to help. The casino boss is informed, the police lie in waiting. And yet Bob goes ahead...

 

For a man who took his pseudonym from one of the great novelists; who adapted most of his films (including 'Bob') from books; and who wrote his own screenplays, Melville has little patience with words, and the story of Bob is brilliantly encapsulated in a series of establishing images. The opening narration eulogises Montmartre with shots defining milieu in realistic terms. yet, when we first see Bob, he is in a setting of extreme artifice, with symbolic chess walls (a recurring pattern) and pictures of, rather than actual, locations.

He puts on his trenchcoat and fedora, his signs of movie criminality; whereas Jimmy Cagney and Humphrey Bogart's characters WERE gangsters by their deeds, Bob plays the role of a gangster just as Ledru plays the role of a cop, and Anne plays the role of vamp or femme fatale - they are recognisably human behind their 'types', but, in this world made of movies, they cannot do the sensible, plausible thing, but are locked into their roles, despite Ledru's humanistic insistence otherwise. Sense would tell Bob to give up the heist; his pre-ordained role means that he cannot.