Bay of the Angels (La Baie des anges) stars Jeanne Moreau as a middle-aged Parisian gambling addict who leaves her husband and children and heads for the roulette tables of Nice. There she meets young and handsome Claude Mann--a meeting which coincides with Moreau's first winning streak.
She latches onto Mann in the belief that he's a good luck charm, and remains with him even when she starts losing heavily. Mann, emotionally drained, walks out of the relationship. The film ends with Mann entreating Moreau to return with him to the bourgeois existence that she'd escaped in the first scene.
Bay of the Angels was directed by Jacques Demy, just before he achieved international fame with his musical films Young Girls of Rochefort and The Umbrellas of Cherbourg.