This film is part of the Jacques Becker season at BFI Southbank. Full details here.
Chicago Reader review:
A radiant Simone Signoret dominates Jacques Becker's 1952 film, which is based on a Paris underworld incident of 1898 that is, in some ways, the French parallel to the legend of Frankie and Johnny. Becker emphasized atmospherics at the expense of psychology, which outraged the literary critics of the time and impressed the young Turks who later made up the New Wave. A turning point for French cinema, although it must be understood in context.
Here (and above) is the trailer.