I won't go into the plot, it's not important, except to say that it centres on a "friendship" between three men. One may have murdered someone in the subway. One is a probably homicidal detective. And the third murdered the first man's wife. This is a French film, and it's hard to see it working well in any other language or setting. The sudden shift to the countryside is a little jarring, but that would be my only minor criticism of the film.