Sarah Midnight is no ordinary teenager. She is a demon hunter, caught up in one of the deadliest wars unknown to man. Orphaned at 16, Sarah learned the family trade of hunting under the watchful eye of her 'cousin', who was revealed to be Sean Hannay, no relative at all, but a dear friend of the real Harry Midnight. Now Sarah and Sean must find the Enemy - the leader of the demons - before the world plunges into the Time of Demons once more. Their quest leads them to Sarah's family home in Islay, where they discover horrible truths about the demon ruler, his plans, and Sarah's own history. Sarah must battle not only the demons but her hurt toward Sean and her feelings for the enigmatic Nicholas, who has plans of his own.