This documentary by Greek director Christos Karakepelis is an essay about crime and punishment – about people with the mark of Cain. Men and women convicted of murder describe the feelings and motives which lead them to their crimes. And those who work supervising the house of Cain are also given a chance to speak. In this highly stylised documentary the director himself has created a certain reality through his selection of shots and by shooting images he himself has arranged. Karakepelis is less concerned with the concrete story of convicted individuals than with contemplating human nature, its incomprehensibility, and the fine line between innocence and the possibility that we, too, might bear the mark of Cain.