Two children wake up in the middle of the night to find their father is missing, and all the windows and doors in their home have vanished.

　　At a cabin deep in the wilderness, a weekend of hunting turns to mayhem and a fight for survival when a pack of wolves attack a man, his female best friend and her fiance.

　　It tells the story of a therapy group that is forced to confront the monsters of their past when an isolated weekend retreat tests their emotional resilience and ability to survive.