When Caleb-heir of the four and alpha of his pack-attends a party celebrating his twin deltas' birthday, he doesn't anticipate finding Luna's greatest gift: his mate, Ava-Rain. Immediately consumed with curiosity and undeniable interest, he manages to make his presence known to her but their introduction is kept brief. To reject one's mate is to reject Luna herself, and that is exactly what Caleb intends to do. Not because he wants to but because he has to. But will he be able to stay away in order to ensure both Ava-Rain's and his pack's safety, or will their unbreakable connection lure him back and add even more trouble into the mix?