China. 1860. The height of the Taiping Rebellion. In his fourth mission, Jack Christie searches for his father in a strange, ice-bound future where China has evolved into the preeminent global super-power. Somewhere in the past, time has splintered and Jack must discover, and resolve, the Point of Divergence - the moment that history changed. Travelling back to 1860, Jack and his friend Angus, find themselves in the midst of the bloody Taiping Rebellion...