La Menace

La Menace is a 1977 French-Canadian film directed by Alain Corneau and starring Yves Montand, Carole Laure and Marie Dubois.
Plot.
Henri Savin has managed a trucking company for his lover, Dominique Montlaur, for many years. Now he is planning to leave her for Julie Manet, the woman he has made pregnant, and Dominique is hysterical. She first threatens suicide, then shows up at a meeting of Henri and Julie. Dominique tries everything she can think of to break Henri and Julie apart, to no avail. Frustrated in her efforts, she jumps off a cliff and dies. Savin insists that he and Julie lie to the police about the encounter, although Dominique's death was a suicide and therefore they had no direct hand in it. Detective Waldeck investigates Dominique's death.
Film location.
The last section of the movie was shot in the Canadian province of British Columbia, on the way from Cypress Mountain to Vancouver. Cariboo Region.
Budget.
estimated 2,400,000 CAD
Awards.
Marie Dubois won César for Best Supporting Actress in 1978.