After Olivia Taylor-Jones found out she was not actually the adopted child of a privileged Chicago family but of a notorious pair of convicted serial killers, her life exploded. She found a refuge in the secluded but oddly welcoming town of Cainsville, Illinois, and began working with Gabriel Walsh, a fiendishly successful criminal lawyer. Their investigation soon revealed Celtic mysteries at work in Cainsville, and also entangled Olivia in a tense love triangle with the calculating Gabriel and her charming biker boyfriend, Ricky. Worse, troubling visions revealed to Olivia that the three of them were reenacting an ancient drama pitting the elders of Cainsville against the mysterious Huntsmen with Olivia as the prize.