Catherine Deneuve plays Eugenia, the queen of an imaginary European country. When her husband dies, quite unexpectedly, the country is left without a king. According to the law, the new king needs to be married so that leaves out the eldest son. Her youngest son, Prince Arnaud (Lambert Wilson) is married to the lovely Armelle (Valérie Lemercier, who is also the director) and they have two young children. They become the future rulers of the kingdom.