On Christmas Eve, Officer Frederick Hartwell believes he's on a routine call-out to settle a domestic dispute but gets more than he bargained for when he finds that the house is empty, it's unnaturally cold and something seems to be lurking in the darkness.

On Christmas Eve, Officer Frederick Hartwell believes he's on a routine call-out to settle a domestic dispute but gets more than he bargained for when he finds that the house is empty, it's unnaturally cold and something seems to be lurking in the darkness.