Leigh McIntyre dreams of a career in flying, but she is stuck in a dead-end job in a university library. A summertime invitation to fly as a volunteer for an environmental organization propels her into an adventure in the deep woods of Montana. The predators she faces there are more terrifying than any wolf she can imagine. Though the flying is dangerous, the risks on the ground are the greatest threat to her life. She joins forces with a reclusive wildlife biologist and a local Native American sheriff to unravel the fabric of clues that cloak the identity of killers that lurk among the trees.