Behind the façade of the world we know, a hidden struggle for control of mankind's destiny rages across time. This secret war is being fought over the world's Feng Shui sites, places of power that serve as focal points for the energy of life known as chi. Those who've attuned to Feng Shui sites reap the rewards of good fortune and prosperity. Attune to enough of them, and you can literally reshape reality to your design. Those who know this secret now wage war in the shadows for this ultimate prize.
However, there's a twist: the secret war isn't just being waged throughout the world, but throughout history as well. Those who control the past can also shape the future. Time isn't set in stone, but malleable, and while the winners of this hidden struggle get to rewrite history, the losers are written out of it entirely. The conduit by which this time war is fought is the Netherworld, a dimension of ever-changing, trackless gray tunnels and caverns inhabited by the cast-offs and exiles of the secret war. The passages of the Netherworld lead to portals which currently open up to four junctures: A.D. 74, 1855, the present day, and 2061. From these four points in time, various factions send their operatives out into the Netherworld and throughout time to do battle.