It's Christmas Eve, the city goes dark, and the few remaining tenants of The Ravenwood find themselves trapped in their building. And they are not alone.

A group of friends on a road trip seek shelter at a mental institution in the woods, only to discover that the building is the home of a mysterious young girl named Roxy whose unsettling presence serves as a foreshadow of doom. Later, as the group attempt to unravel the mystery of Roxy, who seems to have endured years of abuse, a mysterious killer begins to hunt them from the darkness.