As the crimes continue in the series of novels by the creative writer Firas Awadallah, the investigation team in his stories and its hero Hershar turn into a beehive trying to curb the “madness of revenge” of a professional serial killer who enjoys torturing his victims before killing them. In the first crime, we see him hang a woman on a rope and make her fall on knives attached to the ceiling of the piano... after he finishes his piece... and he commits two other crimes against two women in which he uses the “Bobo apple”, which is a perforated metal ball filled with poison and tied to a wire that he places in the victim’s mouth. As soon as the victim moves the metal wire, death awaits her.