On the Aran Island of Inis Mor, off the west coast of Ireland, where Caleb Flaherty encounters the beautiful and mysterious French girl, Coco de Rais, he discovers that she has unleashed a daemon; the vampire, Lucius, hell bent on destroying them and all they hold dear. Now, drawn together from vastly different lives and in grave danger, they must accept and utilize the power they have each inherited through their strange and magical lineage.