Knives fly in the court of King Alfonso VIII of Lleón and Quelino de Tresfoces, an Asturian monk to whom no human passion is alien, wants to become the home of trust of the northern monarch. In the company of Bastián, a novice from the Benedictine monastery of San Vicente d'Uviéu, he will try to get into the Full Curia of a king threatened by the Castilian crown and by the moorish. If it is in Lleón where the battle for the power takes place, Quelino will offer his services as a counselor in La Torre la Resquiebra, a discreet trade in which anyone who wants can hire them for a bag of maravedinos. Bastián is going to be a multitude of witness to the non-pious arts of the dark monk, which is going to place the superstitions of the innocent people as well as to discover hestoric documents or to discover Castilian spies who try to overthrow the monarch. In this medieval game of thrones where no one is who said to be and the blood runs easy, who wants to thrive towards the top of the kingdom more-and worth having his back against the wal.
