Coyote shape-shifter Mercy Thompson has just killed a raging werewolf in hand-to-hand - or is it fang-to-claw?! - combat. But now new dangers come from all directions. The dead wolf's friends, the local wolf pack, even the boy she fought to save are all closing in. Can Mercy survive long enough to get to the bottom of a mind-boggling mystery… or has she bitten off more than she can chew?