Food is scarce after a harsh winter and in order to stay alive, a large timber wolf must fight off two young male wolves and insert himself into a pack led by a strong alpha female. Together they lead the pack’s two-hundred-mile journey along the Winisk River to Hudson Bay and the Severn River, pursuing the Woodland Caribou. As their struggle for survival intensifies, the wolves are threatened by human hunters, near-starvation, treacherous waters, and attacks by competing packs.