On a moonlit night in 1903, a mysterious young woman flees alone across the Canadian wilderness, one quick step ahead of her pursuers. Mary Boulton is nineteen years old, half mad and widowed - by her own hand. Tearing through the forest with dogs howling in the distance, she is desperate and certain of one thing only - that her every move is being traced. Two red-headed brothers, rifles across their backs, lurch close behind her: monstrous figures, identical in every way, with the predatory look of hyenas. She has murdered their brother. As the widow scrambles to stay ahead of them, the burden of her existence becomes a battle in which the dangers of her own mind are more menacing than the dangers of the night.