Catherine de Medici, considered an ordinary and unassuming immigrant, married the young son of King II. Henri of France in 1533 at the age of 14, expected to bring a fortune in her dowry and bear many heirs. However, after discovering that her husband is in love with Diane de Poitiers, who is 35 years old, the dowry is not paid, and she cannot become pregnant. Nevertheless, she manages to keep her marriage alive solely through her intelligence and determination, mastering the monarchy better than anyone else, and will rule France for 50 years.