It’s the Western Front, 1916, and a British tunnelling company are fighting an unconventional war a hundred feet beneath No-Man’s-Land against an enemy they cannot see, only hear.
But the sector they are fighting in has a gruesome history. Thousands of years earlier, it was a holy place where Stone Age tribes honoured their bloodthirsty gods with human sacrifice.
The tunnellers are not alone in their underground galleries. In this land where human corpses are sown like seeds, something evil has taken root.