With Granada increasingly close to being conquered, despite the resistance of Boabdil, Isabel and Fernando will face a new problem: Prince Juan falls seriously ill. If the child does not overcome the crisis, who would inherit the throne?In spite of the warning that the conquest of Málaga has brought with blood and fire, Boabdil continues to take time to surrender Granada: he has obtained the support of the Turkish navy and believes he can resist the Castilians. Or at least renegotiate the capitulations.Unexpectedly, the link agreed between Alfonso of Portugal and Isabel de Aragón and Castilla becomes a marriage for love. The passion among young people has emerged immediately. Only his happiness disturbed the news that Prince Juan, successor of Isabel and Fernando, is seriously ill. If he died, Alfonso and Isabel would inherit the crowns of Castile, Aragon and Portugal.