Montana Territory in 1885 A second lieutenant with the United States Army at the remote Fort Assinniboine is writing home about his interesting encounters while escorting a diplomat. People are missing from the fort, including children, and no one is able to find them. Blizzard-Locked The entire area is locked down due to a blizzard, but a calm in the storm will bring horrific discoveries for the lieutenant, and the rest of the fort.