London, 1890. Captain John Hardwick, an embittered army veteran and opium addict, is releasedfrom captivity in Burma and returns home, only to be recruited by a mysterious gentlemen's club tocombat a supernatural threat to the British Empire.This is the tale of a secret war between parallel universes, between reality and the supernatural; a warwaged relentlessly by an elite group of agents; unsung heroes, whose efforts can never beacknowledged, but by whose sacrifice we are all kept safe.