Yoncey Fosch, the leader of the Unseelie Dhiultadh clan, would give anything to save his brother from a mysterious plague. Anything, including his leadership mantle and a favor to his deadliest enemy, Queen Titania's consort.

But his actions will have far-reaching consequences, and Fosch realizes he is not only unwilling to pay the price, but will defy anyone who dares challenge him.