But when Alex arrives on scene in the Selkirk mountains of northeastern Washington state, she quickly learns that her only challenge isn't finding an elusive caribou on a massive piece of land. The nearby townspeople are agitated; loggers and activists clash over a swath of old growth forest marked for clearcutting. The murdered body of a forest ranger is found strung up in the town's park, and Alex learns of a backcountry hiker who went missing in the same area the year before.
As she ventures into the forest in search of the endangered animal, she quickly finds herself in a fight for her life, caught between factions warring for the future of the forest and a murderer stalking the dense groves of ancient trees.