Eban Heckmaster has always been grateful his mother's human blood cooled the dark thoughts being the son of a demon can bring. He's tried to lead as normal a life as possible by attending medical school and setting up his own practice in New Mexico Territory. But it's no longer enough. After being rejected by a woman he was sure could complete his life, he's counting the days until he can get out of town. That will happen, just as soon as he figures out how to rid a close friend of a demon that's wreaking havoc inside her head. Beryl Brookshier's past only comes in splotchy memories. What she can remember is nothing to be proud of, but there's something more worrisome going on. Long dark moments and passages of time when she can't remember who she's been with or what she's done. She knows that Eban knows what's causing it, but the half-demon doctor isn't telling. And unfortunately for her, he's so distracted by the secret and his desire to leave Berner, he doesn't even see that she's falling in love with him...or is she? When she discovers the lust demon living inside her mind, she begins to wonder if she's in love, or if the demon only wants Eban for her own purposes.