Book 4 in Nalini Singh's Psy-Changeline series keeps on the same beat as the previous. But whereas Caressed By Ice dealt mainly in the SnowDancer pack, here, we're back to DarkRiver. Actually I was a little surprised that there was so little mention of the SnowDancers in this book besides Judd and Brenna. 
 Regardless, this book deals with pack sentinel Clay. Clay has always been more of a loner in the pack and he's got a really big darkside to him resulting from things from his past. When Tally (also part of his past) walks back into his life, he doesn't know if he's happy to see her, or just wants her to be gone. 
 Tally has come back to ask Clay for help in finding children that have gone missing. Clay is her final hope in being able to find these children. She can't forget what Clay was to her years ago, but will he still want her now? 
 I liked that Clay and Tally had a past before the beginning of the story. I think Nalini Singh gave us enough information to understand their bond without overdoing it on any flashbacks. I would have liked for Clay and Tally to have more conflict resolution in regards to their feelings for seeing each other again after a twenty year separation. I mean, they say (and think) about how hurt they are and how much they don't know if they can trust the other again, but when it came down to it, it seemed to all resolve itself too easy. Tally would think that Clay couldn't forgive her for her past. She was set in her thoughts that he would want nothing to do with her, but somewhere along the line she decides within herself that she wants to be with Clay regardless so she just kind of lets her own thoughts and feelings on the matter drop. I would liked to have seen them work it out more between them. 
 I did like that we still get glimpses of our other couples in the series. Especially Sascha and Lucas. Signh does a good job of giving these characters just enough page time, but not too much that they overtake the pair at the center focus of the book. I don't know how she'll manage this as the series continues and more and more people are added. I guess we'll see being as this is a series that I definitely want to continue reading.