Alpha and White?

Kellie was born a pure white wolf. That wouldn't be a problem except that one drop of a white wolf's blood can make you immortal. It also wouldn't effect you except, it is the only thing that can make you immortal. Other immortal's blood will kill you. So let's add in some hunters, a witch companion, an unhappy mate, and an angry wolf seeking revenge. Kellie has a very rough ride a head of her.