L'enfant secret (1979)

Elie, an actress with a passion for travel, meets Jean-Baptiste, a filmmaker ten years her junior. They fall passionately in love. She introduces him to Swann, the child she had with an actor. Elie, who is having several affairs, suddenly leaves Jean-Baptiste. Shattered by the breakup, he turns to mescaline. The effects of the drug are so devastating that he is committed to a psychiatric hospital, where he undergoes electroshock treatment. Elie gets him released from the hospital, then gets back together with him. Deeply affected by her mother's death and losing custody of her child, Elie soon turns to heroin...