Vincent, a real estate agent and father-to-be is invited for dinner by his sister Elisabeth and his brother-in-law Pierre. Their childhood friend, Claude, is also invited. Vincent is a wealthy, successful capitalist, while Pierre, a university professor, is much more liberal. When Vincent reveals the name of his future son, his hosts are horrified. The situation eventually gets out of hand, when no one can come to an understanding, and everyone starts unearthing old rivalries and unspoken issues.