La Balance (1982) - (Nathalie Baye) one-sheet film poster
Imdb plot summary by Paul Berk: "Nicole [Nathalie Baye] is a Parisian streetwalker and Dede [Philippe Leotard] is her racketeer boyfriend, on the outs with his mob bosses because of a dispute over Nicole. When a police informant (balance) is murdered, the cops have to scramble for a replacement. Deciding on Dede, they begin to put a nasty squeeze on him and Nicole." This is one of my favorite French films. The Paris district Belleville is one of the main characters.
Cast and crew: Bob Swaim, Mathieu Fabiani, Nathalie Baye, Philippe Leotard, Richard Berry, Maurice Ronet, Bernard Freyd, Christophe Malavoy, Jean-Paul Comart, Albert Dray, Florent Pagny, Tcheky Karyo, Raouf Ben Yaghlane, Galia Salimo, Sam Karmann, Robert Atlan, Luc-Antoine Diquero