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, her nerves burning, and she is 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, and their cold lust for vengeance is unswerving...