In the shadows of the Vestiges of Magic world, cambions serve as bounty hunters for Hell, ensuring the wicked get the punishment they deserve. It’s a family business—and this foster family is deeply dysfunctional.

Vex never asked for this life. But after her boyfriend’s murder, her only path to survival and vengeance is to accept a demonic pact and become a cambion. Her guide is her foster sister, Thaena Ashmore, a centuries-old assassin who’s as weary as she is deadly.

Bound by duty and a fragile sisterhood, Vex and Thaena walk a razor's edge, with enemies on every side. One misstep could turn render these powerful hunters into little more they prey. As their stories entwine, they discover a threat that could shatter the ancient laws of the Netherworld.

When you work for Hell, what happens when it goes to war?