Sierra has no idea shifters exist until she finds herself mated to one.
Jaxon isn't expecting to meet his mate, but when he walks into a diner and sees Sierra, he knows he's found the one.
The same day he meets her, he finds out a group of rogue vampires want to take over his pack. The Small Town Pack is strong, one of the strongest around and they won't back down. If the vampires want a war then a war they will get.