Junon (Catherine Deneuve) and Abel (Jean-Paul Roussillon) are the parents of three grown children: Elizabeth, a melancholic playwright with a mathematician husband and a tortured teenage son; Henri (THE DIVING BELL AND THE BUTTERFLY’s Mathiue Amalric), the self-destructive black sheep; youngest Ivan, the peacemaker, husband, and father to two eccentric little boys; while a fourth, Joseph, died from leukemia as a boy. When the disease reappears again in the family, everyone returns home for a long Christmas weekend together. Crowded again under the same roof, solidarity quickly — and hilariously — devolves into feuding, drunkenness, and bed-hopping, as everyone struggles to make sense of the mysteries of family, life, and what lies ahead.