Nina has spent nearly a year hunting the man who murdered her best friend.

She has stolen evidence, broken into places she definitely didn’t belong, and built an entire room dedicated to finding him. Revenge is the only thing keeping her moving—and she has no intention of stopping until Kyle pays for what he did.

Then a mysterious woman hands her a badge and points her toward the one place Nina has never been able to access.

What she finds there leads her to two other women—and eventually to a hidden town, a world that shouldn’t exist, and Dax, a dangerously charming stranger who seems determined to follow her everywhere.

Dax has spent thousands of years with nothing left to surprise him. He’s explored every corner of the Underworld, irritated nearly everyone in it, and become the kind of monster even nightmares know to fear.

Then Nina walks into his existence.

She’s angry, stubborn, grieving, and absolutely uninterested in the man who keeps appearing at her side.

He is immediately obsessed.

But Nina didn’t come looking for love. She came for vengeance, and the deeper she digs into Kyle’s disappearance, the closer she gets to something far more dangerous than the man she’s hunting.

Because someone has been pulling the threads all along.

When Nina becomes the next target, Dax will have to decide exactly how much of eternity he’s willing to sacrifice for the woman who finally made him want to live it.