The main character in the series, Hector Belascoaran, works in an office. He doesn't like this job very much. The firm is not developing, and neither is he. The man has always dreamed of progressing, but he realized that he is standing still. His boring marriage is also destroying the hero from within. He feels lonely. The truth is that to change things, you have to give up what you already have. The main character dreams of becoming a private detective and dealing with complex investigations. He will have to deal with difficult cases involving crimes committed in the seventies of the last century in the city of Mexico City.