At the end of the sixteenth century, religious upheaval brings fear, superstition, and doubt to the lives of mortals. Yet unbeknownst to them, another world lies just beyond the Veil: the realm of the Sithe, a fierce and beautiful people for whom a full-mortal life is but the blink of an eye. The Veil protects and hides their world…but it is fraying at the edges, and not all think it should be repaired.

Discarded by his mother and ignored by his father, sixteen-year-old Seth MacGregor has grown up half wild in his father's fortress, with only his idolized older brother, Conal, for family. When Conal quarrels with the Sithe queen and is forced into exile in the full-mortal world, Seth volunteers to go with him.

But life beyond the Veil is even more dangerous than they expected, and Seth and Conal soon find themselves embroiled in a witch-hunt—in which they are the quarry. Trapped between the queen's machinations at home and the superstitious violence of the otherworld, Seth must act before both of them are fed to the witch-hunters' fires…