Vincent, a successful forty-something, is about to become a father for the first time. His sister Elisabeth invites him to a dinner party at her beautiful apartment in Paris, with her academic husband Pierre and his childhood friend, Claude. Whilst waiting for Anna, his stylish younger spouse who is always running late, his cohorts gleefully bombard him with questions on his fast approaching fatherhood. But when his hosts ask Vincent what name he has chosen for his future offspring, his response plunges the family into chaos.