Look. Madeline. You’ve lost your soul. You’ve lost your freedom. You’ve lost a bit of your sister. What else could go wrong?

Catlin and Madeline are extraordinary sisters, living extraordinary lives - in a place that seems entirely ordinary, but which in fact seethes with secrets, both sacred and sinister. Ballyfran is a village where, for centuries, people who are not quite human have gathered. Catlin has already fallen foul of one such creature - a dark, vicious predator who almost killed her - and only Madeline giving up a part of her own soul was able to bring Catlin back from the brink of death.

Now, the girls are making their strange new lives: Catlin, haunted by what happened to her, is isolated and bereft; Madeline is learning ancient magics under the tutelage of local wise woman Mamo. Learning that magic isn’t mindfulness and hats. It’s work - hard work. And Madeline knows she has to keep watch. On her sister. On the things that happen. Notice things before they start to happen. And before long, they do …