Le Prénom : la pièce de théâtre: Vincent, a triumphant forty-something, is about to become a father for the first time. Invited to dinner at the home of Élisabeth and Pierre, his sister and brother-in-law, he reunites with Claude, a childhood friend. While awaiting the arrival of Anna, his eternally late wife, he is pressed with questions about his impending fatherhood, all in good humor... But when Vincent is asked if he has already chosen a name for his unborn child, his answer plunges the family into chaos.