Carol Anne Davis profiles fourteen women who used arsenic, manual strangulation, suffocation, lethal injection, multiple gunshots and stabbing to kill their victims. Many of them tortured and sexually assaulted their victims before death - sometimes keeping them alive for several days. Each killer is the subject of a separate chapter, exploring her childhood, lifestyle and sexuality. There is analysis of the murder, the trial and the subsequent imprisonment of every woman. Carol Anne Davis comments on the classification of female killers, how society may underestimate dangerous women, and what it is that can turn ordinary women into killers.