Aithen's having headaches that aren't headaches. How's he supposed to tell Olivia the truth about what's happening to him? Haunted by memories he shouldn't be remembering, memories of slaughtering of monsters. He'll never be clean of the sins he's committed. One monster. Himself.
The second Olivia knows who he really is, he's sure she'll recoil in disgust and hate him. To prevent that, he does the only thing he can. He removes himself form her life and leaves his heart-and hers-shattered.
Olivia has a secret. Well, maybe more than one. Right now, she's dealing with a beast that's escaped from the depths of hell and has her in its sights. All alone, with Aithen far removed from her life, she's simply trying to survive. Things don't seem to be too dire. Until they do.