Drew and Indigo are members of the SnowDancer pack. They're coworkers and friends but Drew wants a lot more than that, he wants Indigo as his mate. Indigo is happy the way their relationship is, she's not interested in a relationship with a younger, less dominant man. 
 I'm never as interested in the books without a Psy as a main character. I was pleasantly surprised at how much I liked this book. Drew and Indigo were great together. Individually they were likable and kept my interest and when they got together it felt right. 
 There was a nice amount of build up in the side story of the Psy/changeling war. That was well integrated into the book and added to the story overall. The appearance of past main characters (Max, Sophie, Riley and Mercy) was nice to see and kept them fresh in my mind. Singh also did a great job of building up the tension between Sienna and Hawke. I can't wait to read their story.