London: 2038. In a time when man had become dependent on science, believing only in what he could define or create, ancient knowledge and rituals were lost to the antiquity of time. Prophecies that had stood as warning for untold generations were seen as archaic folly or ignorant superstition. It was then, at mankind's weakest moment, the demons came. Their brute force and overwhelming numbers swept the globe with little trouble. Mankind was forced underground, scavenging to survive. Now, 18 years after the demonic invasion of 2020, in the winding tunnels of the London underground, a new Alliance is forming to battle the hordes of hell that have destroyed London. Templar Knights, Arcane Cabalists and Demon Hunters are uniting in mankind's Alliance. Join them, push the demons back to hell, and reclaim the surface.