Don't go outside. Don't answer the door.  

The night over Deep Dell has turned orange.

A sudden jack-o-lantern sky on a snowy, sleepy evening.

The residents of the snow-bound valley don't know it, but their lives have changed forever. What they always believed about their place in the universe was wrong. They're no longer alone on this cold, terrifying night. 

Trapped in the valley, they must pull together, protect each other against an enemy they never expected, and can't explain. 

Because what do you do, when the enemy turns out to look just like you?