Being part-human in the Four Regions is a dangerous business. There is no true safety, even when hidden away in the Mountains. That’s why Fern’s parents are so protective, why they don’t belong to an established clan—she and her best friend Kraai have human blood within their veins. At least, that’s what they’ve been told their whole lives.

When Fern receives a letter from a mysterious stranger, the truth is revealed:

The truth about her parents.

The truth about her friend.

The truth about her own blood.

Answers and safety lie within the Light Region, beyond a veil of secrets. Will the truth be too much for Fern to handle or will she be able to embrace an inner darkness to keep herself and her loved ones safe?