A disturbing black comedy based on the real life story of poisoner Graham Young, whose killing spree shocked English society in the 1960s. Graham became a chemistry enthusiast at a young age. His fascination with toxic substances led him to embark on a series of a bizarre experiments in which he used his stepmother, sister and others as guinea pigs. After Graham was arrested for his deeds, a dedicated doctor attempted to rehabilitate the young man so he could once again enter society. But can Graham actually change his ways?