Nathan Stiller is a special agent with the Federal Bureau of Investigation in New York. He has left his dark past behind and is trying to start life over with a clean slate. During the day, he defends justice while working for the FBI, and at night he experiments with his wounded mind. Everything changes when Nathan is faced with a series of extremely sophisticated murders. Starting the investigation as a private, he strives to understand the meaning of the atrocities committed by the maniac, and does not even suspect that this case will forever change his attitude towards life. Nathan faces the most difficult tests, cruelly testing not only his physical strength, but also the endurance of his mind. And he will have to understand not so much the investigation, but himself in order to make the right choice, finding himself face to face with the difficult truth from which he has been trying to escape for many years...