Alone on a mid-winter night in the forests of North America, Jonah Mackenzie is pinned by a falling tree while cutting down wood for his fire and is forced to hack off his leg with a chainsaw so he can crawl to safety. But at the height of his subsequent war against the wilderness he finds that someone is systematically destroying him, until his own life is hanging by a thread. Mackenzie is forced to confront the excesses of his private war and compromise every ideal by which he has lived and fought.