Part of a small demon lair in Las Vegas, tattooist Harper Wallis lives a pretty simple life, if you discount her 'colourful' family. That changes overnight when she discovers that her anchor - the one demon who can ensure she never goes rogue - is Knox, a guy who's rumoured to be the most powerful demon in existence. Knox wants his anchor; he also wants Harper in his bed, and he's used to getting what he wants. As far as he's concerned, he'll have her, and he'll keep her safe from the threat that looms over her. She's not so sure she wants either of those things. What she does know is that she's not about to sit back and ignore the danger to her ... or him.