This is fourth book in this series. It is about Rui and Kihyun's relationship and how they come to be together. She's come from across the sea to join a new family and a new pack. And the moment Rui arrives she finds her destined mate. A relationship is the last thing she wants, at least until she can prove her worth to her new Luna. But can she really deny herself the attraction she is feeling or is it just the mate bond pulling her towards him. Kihyun is the third in line and can handle just about anything you throw at him... Except her. Rui is a breath of fresh air that brings him a new challenge but can he get over finding out her secret? Will he be able to forgive himself or will this be the end before it even begins.