The Spanish Infanta Carlota Joaquina is promised to D. João VI at the age of 10. Forced to leave for Portugal, Carlota suffers a great disappointment when she meets her promised prince. With the death of D. José, Carlota Joaquina and D. João VI inherit the Portuguese crown. However, frightened by the French Revolution and the approach of Napoleon's army, they decide to flee to their colony: Brazil.

Carlota Joaquina, Princess of Brazil

Living in the house of Uberto as a child, Serpina is now a beautiful young woman who, seeing her master willing to marry, decides that it will be her and not any other woman. Adaptation of the Opera buffa La Serva Padrona.