The play "Yvonne, Princess of Burgundy" tells the story of a girl, unusual in the system, whom Prince Philippe decides to marry. The immature whim of his adult son is very much resented by the Prince's parents, King Ignatius and Queen Malgorzata. Meanwhile, the dumb and unprepossessing young lady surprises the surroundings, causing a feeling of discomfort that reveals the extent of her disgusting pandering and accommodation.
The inability to overcome the incomprehensible and "inconvenient" prince's fiancée's disturbing power over the ugliness forces radical measures...