Vincent, a successful forty-something, is about to become a father for the first time. He is invited to dinner at the apartment of his sister, Elisabeth, and brother-in-law, Pierre, where he catches up with his childhood friend, Claude. Whilst waiting for Anna, his younger spouse, his fellow guests happily 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.