Isabel, frightened and sunk by the threats received, does not decide who to marry: the Duke of Guyena or Fernando de Aragón. Both are of the same age. And the Frenchman guarantees that he will avoid further tensions with his brother the king, who holds him responsible, should he refuse, for a new war.

That is why he asks Cárdenas to travel to Zaragoza and Paris, get to know both suitors thoroughly and inform him with hairs and signs of how they are. And then, will she decide?

Cárdenas fulfills the order of Isabel¿ but, as Chacón y Carrillo, his bet is clear: Fernando de Aragón. The bet of Juan II, king of Aragon, is also clear: Aragon, at war with France, needs support. Your financial situation is complicated? And this wedding can be a good option for the future, by uniting the interests of your kingdom with those of Castilla.

Isabel is shocked. The fact of knowing Fernando has increased the nervousness more. She can not define her emotions, but she is obviously attracted to him. Fernando realizes his nervousness and tries to win her talking ... But his impetus as a man accustomed to knowing a thousand and one women contrasts so much with Isabel's candidness, in these matters, ends up spoiling his good intentions.

In addition, he captures that Gonzalo is especially aware of Isabel. And establishes a relationship with him. There he will realize that he is very similar to him: a soldier with nobility and discipline. With ideals Loyal to a cause until death.

The wedding is coming. Clara, the wife of Chacón, appears in Valladolid by express order of Isabel's mother to support her in such a special moment. Know that your daughter needs someone to act as a mother? She, sick, can not go and delegates to her other "mother", who nursed her as a child: Clara, who will help Isabel in such special moments.