Saoirse Dannan is ripped from her mundane life when a killer comes for her family. All of the Dannans are brutally murdered, while she and three of her cousins are spared by a mysterious force. Drawn to the manor they left behind as children, Saoirse and her cousins learn that a sinister cult lies at the center of a tangled web of Celtic myth, quantum physics, and ancient magic. New worlds and new relationships yield unexpected passion as they search for a way to defeat the cult. When Saoirse suddenly becomes the only one capable of wielding the power that can save them, the fate of worlds is in her hands. She must not only summon the will to live, but face her demons before all is lost forever.