On November 1st 1916, 900 men of the 1th Battalion of the Pennine Fusiliers vanish without trace from the battlefield only to find themselves on an alien planet.

There they must learn to survive in a frightening and hostile environment, forced to rely on dwindling supplies of ammunition and rations as the natives of this strange new world begin to take an interest.

However, the aliens amongst them are only the firs of their worries, as a sinister and arcane threat begins to take hold from within their own ranks...