In «Lapònia,» two couples, Ramon and Mònica, and Olavi and Núria, gather during Christmas in Finland. Tensions arise when Aina, Ramon and Mònica’s daughter, reveals to Martí, Olavi and Núria’s son, the truth about Santa Claus, sparking a family conflict. Each couple defends their perspectives on truth and lies, questioning the values and beliefs they impart to their children. The situation intensifies, testing relationships and forcing them to confront the reality of their cultural and personal differences in a snowy and isolated setting.