When the Wild Pack discovers that a traitor is in their midst, the ensuing tensions and suspicions threaten the precarious peace among the survivors, challenging protective Storm to do whatever she can to keep everyone safe.

There is darkness at the heart of the Wild Pack. Whisper is dead -- and Storm is certain that his wounds could only have been inflicted by another dog. Storm doesn't want to believe that one of her Packmates could have done such a vicious thing. But as she wrestles with her suspicions in the light of the Sun-Dog, at night Storm is haunted by terrifying dreams -- visions of fear and shadows that guide her paws through the forest while she sleeps. Lucky...