In the action-packed thriller Original Sin, a powerful and secret society of religious zealots have one mission-to cleanse the world of impurity. The group hires a female assassin to seek out and viciously purify adulterous married men. Brandy's hunting ground is none other than an adult online chat room. Brandy has no patience for the liars and cheaters who sin as adulterers. After the men display their true intentions in the chat room with her, she realizes they are deserving of everything she is going to do to them. When Brandy's first victim is found in a ramshackle motel room filleted by a butcher knife with the word "sinner" crudely written in blood on his forehead, newly-promoted Chicago police detective Dallas Holden is called in to supervise the homicide investigation. As the case progresses, Dallas enters the fascinating and highly seductive realm of online chatting in order to find the killer. Danger mounts as Holden finds himself entangled in an intricate web of love, betrayal, and power that inevitably leads to a confrontation with a trusted ally and the leader of the secret religious society-a showdown that will change Dallas Holden's life forever.