Fernando sends his son, Sancho, with a small army to Zaragoza to confront his brother, Ramiro, the King of Aragon. Before leaving with Sancho, Ruy reveals to the King that Flaín tried to kill him. Fernando starts to investigate who betrayed him. Meanwhile, Ruy leaves León ignorant to the fact Flaín sent a hitman within the troop to kill him.

The Castile tropos with Sancho and Ruy fight an outnumbered battle against the Aragonese. When all seems lost, the outcome seems totally unexpected. In León, Fernando discovered who was conspiring against him.

Sancho has decided to execute his brother Alfonso and the rest of Leonese nobles who support him, including Orduño. As soon as Alfonso is dead, Sancho will be crowned King of Leon, and as a reward for his services, he offers Ruy the title of Count when Orduño is executed. He can finally get everything he has dreamed of: nobility, lands… and Jimena. But there is something Ruy isn’t counting on.