First... I hated Hamilton (the eagle leader of the nest) more in this book than the last book. He's a right asshat who needs someone to point out he is neither flawless nor infallible. Just because he is the leader does not mean he is always right. 
 Okay, I feel much better having gotten that off my chest. 
 Second, if you haven't read Duck!, it would really help you understand the society and Raynard & Ori better. While they're not the main focus of this story, they do appear multiple times in it. 
 So, Everet is a raven and the recently made Head of Internal Security for Hamilton's nest. He is sent to bring back a magpie who was kicked out of his previous nest and has been living with humans for too many years. It is an "established fact" that magpies cannot change their thieving, whoring ways and cannot be rehabilitated, so Hamilton is going to send Kane to the nest's cages for life. Instead of letting Kane spend the rest of his life in the cages, Everet vouches to take care of him and share in his fate. Everet is granted full ownership of Kane. 
 First, he has to help Kane through a withdrawal from a drug called quicksilver. Then he has to teach Kane that he isn't worthless and that he can fight against his natural tendencies and be a good avian, no matter what anyone else thinks. 
 Kane has to overcome his drug dependency, conditioning, and prejudices before he can become a productive member of the nest. 
 The story is told from both Everet and Kane's point of view at various times, which works for the most part. The one thing I was disappointed in is that Kane's transition was almost too subtle. Kane never once had the realization that instead of thinking about getting away from Everet, he's suddenly only thinking about keeping him and staying with him. He never had that freak out moment of "that's not me", though he did misinterpret some of what Everet was trying to do/show him and revert to his old ways because of it. 
 Be that as it may, it was a sweet story, and Everet and Kane did work together. 
 Finally, there were several glaring typos (you're/your, they're/their, Reynard/Raynard, manor/manner) and some missing words. Enough to notice.