Christmas Eve, and the residents of a quiet British cul-de-sac are suddenly plunged into a world of violence, terror and paranoia when a group of heavily armed military personnel storm their road ordering them at gunpoint to retreat inside their homes.

Unsure if this is the sign of a terrorist attack, or something much worse, one local mother finds it in herself to desperately fight to save her estranged daughter stranded across the street. However, with growing dread, the residents soon discover that the threat is more monstrous than any of them could possibly imagine, and survival is no longer a guarantee...