You have walked past at least one psychopath today without noticing. He could have sit next to you in a meeting. And tonight a narcissist is waiting for you at home and outside your window a stalker is watching every movement you make. Who are these dangerous people? At the hand of in-depth research and many case studies - from Daisy de Melker to Oscar Pistorius - these people become very real. So that you can stay away from them ...