Kingdom of Castile, 1283 A.D. Alvar León de Lara, cardinal of the curia, returns at the request of his former mentor to the abbey that was his home, which he left twenty years earlier with his soul broken by an impossible love. His master wis...

Kingdom of Castile, 1283 A.D. Alvar León de Lara, cardinal of the curia, returns at the request of his former mentor to the abbey that was his home, which he left twenty years earlier with his soul broken by an impossible love. His master wishes to reveal to him something that will change the course of Christianity. However, Alvar's arrival will unleash tragedy: enigmas behind hidden doors, unexplained crimes, symbols that lead to clues and clues that lead to traps. A dizzying descent that will bring him face to face with the woman who tore his heart out, the intransigence of cowards, the struggle to remain among the living and, finally, the Ten Steps.