Flaín wants the man who upset the conspiracy. Rodrigo knows it was his grandson, which is why he intends to send him off to Vivar. On the other hand, Ruy resists leaving the King at the expense of Flaín, as he sees the only solution being to end the Count of León's life. When it looks like everything is about to kick off, the Navarre troops turn up at the border and declare war against León.