A young couple's dream of starting a family shatters as they descend into the depths of paranoia and must struggle to survive an evil presence that wants nothing more than their very own lives.

When Santa sets off on his Christmas duties a day early, crashes into the Fox family's house, ends up with amnesia and loses his magic sack of presents, he needs help! But the Fox family are a modern and broken family. Can they help him? The parents are preoccupied with work and the kids aren't very festive. But it's up to them to help Santa find his magical bag of toys and the clock is ticking or Christmas will be ruined. Forced to set their own problems aside and work together the Fox family...