The life of a police officer is not easy, or at least if you are Nicolás Duarte, a cunning young man who is assigned the mission of protecting Amparo Benavente, a mysterious girl who comes to visit and in passing to play revenge for the events that occurred. 8 years before the beginning of the story. But, what he doesn't know is that just 20 years before, Álvaro Grau had a relationship with his mother, but due to a dark secret they distanced themselves.