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?