During Napoleon's retreat from Russia in the War of 1812, cavalry officers Valentine and Oscar are separated from the main army by a brutal blizzard. They think the worst thing waiting out there in the snow for them is Death. They could not be more wrong. The two soldiers stumble across an ancient conflict between beings more powerful than humanity can imagine, a conflict which now threatens to consume the Earth and all upon it -- because those who have stood in the horror's path, the few bastions of light, are going home.