She’s the one mistake he’ll never get over. He’s the one enemy she can’t bring herself to vanquish.

Science and reason ruled Gideon Bennett's life until the death of an Immortal triggered a physical transformation, forcing him out of the laboratory and into a world of violence. Eight years later, he’s become a powerful Immortal warrior, but continues to be haunted by the face of the woman who died because he hadn’t been strong enough or fast enough to save her.

Lyssa James wasn't looking for trouble when she set out to enjoy a night on the town away from her dead-end job and obnoxious ex-boyfriend. Instead she got a first-class ticket to a demon hell dimension where she has been trapped for eight long years. Now she's finally escaped...only to run into the very man who sent her there in the first place.

Neither of them are the same people they were eight years ago, but getting reacquainted is the least of their worries. One of the nastiest demons from the Abyss is on the loose, and it threatens not only their lives...but the future of humanity.