Cromosoma 21 plot
Tomás Ruíz is a 26-year-old with Down syndrome. One day he is found next to Orlando Mandujano's lifeless body. The investigation that is being launched is uncertain about the involvement of this man. Was he the murderer or is he just a witness? Mariana Enríquez, the policewoman in charge of investigating the case, puts her own life in danger as she searches for the truth.