It's the year 2038 and London lies in ruins. The nearby Hellgate has turned the sky gray and it's presence dominates the horizon. The Invasion eradicated the powerful nations of man and the decades-long process called The Burn has begun which alters and assimilates our world to make it feel more like home for the demons that now roam the streets of the destroyed city. The last surviving members of mankind are hiding in the shadows deep down in the former train stations of the city and do what they can to fight back and perhaps even stop the madness.