Takoda, Alpha of The Shoshone Tribe, knew the laws were clear when you came upon a lone pup during the rebellion. You either take the babe in as one of your own or banish them to a part of the country where they could do no harm.
She couldn't have been more than 14 or 15, young enough to train in The Shoshone ways, but old enough to give the young Omegas in his pack reason to hate her. And because of that reason alone, he couldn't take this girl called Treasure into his fold. So he did the next best thing. He entrusted her upbringing to his friend, Nayati, Alpha of the Cheyenne tribe.
All was supposed to fall into place until the Cheyenne tribe had a falling out with his Shoshone one. He'd have to fight against the one person he wanted to save unless he made her his Treasure.