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.