Неизвестный номер

A mysterious phone call will change the life of the writer Valentino Lombardi and his family. He will be violently harassed by a psychopath who will play the bloodiest and most macabre horror story with him. But that's not all, for years he has studied it and will take revenge by torturing anyone who meddles. They must fight to survive and face such an atrocity. Who is it? And what do you want?