It's Christmas Day and the Milgram family wakes to find a mysterious black substance surrounding their house. Something monumental is clearly happening right outside their door, but what exactly? Descending into terrified arguments, they turn on the television, desperate for any information. On screen a message glows ominously: 'Stay Indoors and Await Further Instructions.' As the television exerts an ever more sinister grip, their paranoia escalates into bloody carnage.