Human, though raised by werewolves, Bryn is the alpha of her own Cedar Ridge pack. For reasons detailed in the first two books of this series (Raised by Wolves and Trial by Fire) Bryn's pack is unusual because it contains eight females. Female werewolves are an incredibly small minority of all werewolves. The facts that Bryn is female and human and has so many females in her pack make her a target of werewolf politics.
Bryn's major rival is Shay, the alpha of the Snake Bend pack. He has been plotting and scheming to take over her pack and her females for three books now. It doesn't help that Bryn's second-in-command and best friend is Shay's brother.
This time his scheme include finding a way to claim Maddy who was a former pack member of Bryn's and who now might be Rabid and killing humans in the no-man's-land that borders each werewolf territory. Bryn and some companions have to find Maddy, stop the killing of humans, and find a way to outwit Shay by using werewolf laws against him.
This was an exciting story with lots of adventure and danger. Bryn has so many decisions to make in order to be the alpha of her pack and each decision comes at great cost. Sometimes, often in fact, she doesn't have any good choices and has to pick the least bad of her options.
I recommend this to readers who love werewolf stories but also recommend reading the first two books in the series before this one. I don't think that this one would stand alone well.