Knox Randall is a damn good police detective with a damn big secret. He's a werewolf. Only he and his partner, Blake, know the truth. And, even though he's attracted to his partner's sister, he's been avoiding her for her own good.

But, after Knox steps in front of Blake to keep him from getting shot, Blake knows he can't take Knox to the hospital. Bleeding out isn't an option either, so he turns to his sister.

Hannah Turner is a veterinarian, and when her brother comes to her for help, she reluctantly agrees when she learns Knox has been shot. Hannah's had a crush on Knox for as long as she's known him, but he has always gone out of his way to keep her at a distance. Despite not understanding his aversion, she welcomes him into her home, determined to mend him.

With the full moon approaching, Knox finds it hard to keep his hands off her. He must either use all his willpower to stay away or let the power of the full moon consume them both.