The seemingly admirable and respectable middle class man, John Haigh, guilty of six grotesque murders in which each victim was drained of blood and later dissolved in acid. Haigh's calculated disposal of the bodies was an attempt to acquire their wealth in belief that this would prevent any risk of conviction. Was he a blood thirsty Satanist or one of the most cunning and callous killers who would do anything for money to feed his greed for money.

Scarred by a traumatic and unstable upbringing, Donald Neilson was the serial burglar turned masked murderer obsessed with weapons and military conduct. The meticulous nature to his three murders, became increasingly violent ending in the kidnapping and brutal murder of seventeen year old heiress Lesley Whittle.