Descente Aux Enfers

Descent into Hell is a 1986 French psychological thriller film directed by Francis Girod from a screenplay he co-wrote with Jean-Loup Dabadie, based on the 1955 novel The Wounded and the Slain by David Goodis. The film stars Claude Brasseur and Sophie Marceau as a married couple—she with a dark secret in her past and he, an author suffering from both writer's block and alcoholism—who undergo experiences which strain their relationship to breaking point while vacationing in Haiti.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.