For many years in Italy, cheap detective and mystery books were printed with "yellow" covers and sold at news stands.
Over time, gialli / giallo become the accepted popular names for mystery and detective stories.
As soon as he arrives, he finds his sister murdered in her house.
The police is unable to handle the case because there wasn't any serial killer in Lebanon before.
The same night, Marc witnesses another murder while being drunk. He noticed something strange about the murder, something important he is unable to remember.
Due to the incompetence of the police, Marc decides to find the killer and revenge his sister's death.
