Caritea, regina di Spagna, ossia La morte di Don Alfonso re di Portogallo
Portuguese King Alfonso attacks Spain after Queen Caritea refuses to marry him. Diego, a Spaniard who fled ten years earlier after killing a rival suitor, enters the Portuguese camp. Caritea infiltrates the camp in disguise; Diego saves her, but she does not recognize him. She had vowed to marry anyone who brings her Diego’s head. Diego offers to escort her home and proposes marriage, but Caritea repeats her condition. Alfonso challenges Diego to a duel and is killed. Diego returns to Toledo as a hero, reveals his identity, and Caritea forgives him and agrees to marry him.