As the only hedgewitch in Blackthorn, Massachusetts, an uncommonly magical place, Aziza El-Amin has bargained with wood nymphs, rescued palm-sized fairies from house cats, and banished flesh-eating shadows from the local park. But when a dark entity awakens in the forest outside of town, eroding the boundary between the human world and fairyland, run-of-the-mill fae mischief turns into outright aggression, and the danger becomes too great for her to handle alone. Leo Merritt is no stranger to magical catastrophes. On his sixteenth birthday, a dormant curse kicked in and ripped away all his memories of his true love. A miserable year has passed since then. Desperate for answers, he makes a pact with Aziza: he'll provide much-needed backup on her nightly patrols, and in exchange, she'll help him break the curse. But when the creature in the woods sets its sights on them, their survival depends on the aid of a mysterious young necromancer they're not certain they can trust. They'll have to work together to eradicate the new threat and take back their hometown... even if it forces them to uncover deeply buried secrets and make devastating sacrifices.