Nurse Kylie Pendragon has accepted her new life in Thaydon, serving as a medicine woman and witch. But when the wizard Lignoss kidnaps Kylie's brother and uses his Bible to start a dangerous new cult, Kylie must do the unthinkable to prevent the Book of Revelations from coming to pass in the nation of Bromfryel, where the cult has spread like wildfire among the white slaves and a scheming criminal means to kill the black aristocrats, all except herself and her son, that is.