In 2007, when Paris Bennett was 13 years old, stabbed his four-year-old sister to death, a crime for which he has been behind bars ever since. Now 25 and in his first interview on British television, he tells Piers Morgan how this was no impulsive fit of rage but rather a cold, deliberate act planned as an act of revenge against his mother Charity - who is watching the interview unfold in a nearby room. She has stood by him even though she fears that when he gets out, he could still harbour violent intentions towards her - or even worse, towards his younger brother.

In this film, Piers Morgan comes face-to-face with a serial killer who not only admits his heinous crimes but is willing to explore what in his psyche compelled him to commit cold-blooded murder.

Throughout their encounter, Piers draws fascinating psychological revelations from Bernard Giles at every turn. Giles acknowledges that even as a teenager, he knew he was destined to kill and admits that he first experienced the nascent thrill of sexual violence as a 6 year old boy, when playing a game with his female next door neighbour.