During the sinister killer clown craze of 2016, Dr. Ellen Marks, aided by investigative journalist John Parker, trace the source of the phenomena to one of her patients - incarcerated, charismatic serial killer Carl Cane, who is using his insidious clown symbolism to recruit an army of the disenfranchised and launch a murderous anarchist movement from London across the globe. With Cane escaped and on the run on October 31st can they stop him before he unleashes hell on earth on Halloween?

Jaded detective John Verney is on the trail of an ancient cult of Plague Doctors which is cutting a bloody swathe through the London underworld. Dismissed by his superiors as gang on gang killings, the murders draw Verney into an obsessive maze of a secret society conspiracy with links to the Jack The Ripper murders of 1888, putting him and his family in grave danger.