The Alphas first born is supposed to be next in line. It's always a boy that is born first, right? What happens when the Alpha of the most fearsome pack has a girl? Luckily the Alpha told everyone that his wife had a miscarriage, once he found out. Female warriors are accepted, but a female Alpha would be outrageous.
Adena Clarke is hidden in the shadows. She's kept in a level lower than the rogues in holding cells. She's watched over by former Beta Joseph Clarke lost his mate before knowing her. He now has a new purpose in life, showing the world who the next great Alpha is. The Alpha doesn't bother with Adena, he is busy raising his less than enthusiastic son how to be an Alpha despite the lack of the gene.