In this sexually frank French drama, the aimless young Alexandre (Jean-Pierre Léaud) juggles his relationships with his girlfriend, Marie (Bernadette Lafont), and a casual lover named Veronika (Françoise Lebrun). The dialogue-heavy film focuses intently on the love triangle, with Marie increasingly jealous of Alexandre's fling with Veronika. As the trio continues their unsustainable affair, the emotional stakes get higher, leading to conflict and unhappiness.