Madeleine, 92 years old, decides to set the date and conditions of her departure. By telling her daughter Diane and her son Pierre, she hopes to prepare them as gently as possible to her coming disappearance. But for her children, it’s a chock, and minds are set ablaze. Until the end, Madeleine will keep her dignity, wits, and passion for life as a course of conduct, so she can give them all, and in particular Diane, a touching “final lesson”.