When Queen Juana is finally pregnant after 7 years of marriage, King Enrique IV orders that his half-siblings Isabel and Alfonso be brought from their home in Arevalo to the decadent Royal Court of Castile in Segovia.
Javier Olivares wanted to begin with Álvaro de Luna's execution in 1453 and Gonzalo Chacón being declared tutor of the infantes Isabel and Fernando in Arévalo, which was in essence a ploy to take him away from the Court, but TVE vetoed any first scene that didn't feature Isabel.
Isabel de Castilla:
might rule in Aragon. But the one who reigns in Castile is me.
Spanish, Latin