Trust can kill.

Forensic specialist Dr. Cassia Davis learned that lesson when she placed her faith in the hands of the man she loved. Four years later, she lives a virtual life teaching and consulting online, locked away from the world she's come to fear. Her expertise and guidance helped to uncover a mass burial site in the Hollywood Hills, the biggest case of her career, but her inability to work the scene calls her competence into question. If she's going to remain in charge, she's going to need someone on the ground. Someone who understands how she thinks and what she can do. Someone willing to do anything.

Some mistakes can't be forgotten. Or forgiven.

FBI Special Investigator Mitchell Keaton's lapse in judgement nearly cost Cass her life. Every case he's worked since has been an exercise in redemption. Becoming Cass's eyes and hands out in the field means reconnecting to her. Mitch can't help but feel there may be hope for them.

But the deeper they dig into the burial site, the further into danger they fall. Invisible enemies determined to stay in the shadows have plans to stop them. Plans that begin with exploiting the one thing Mitch and Cass have no defense against: the past.