In the first great allied tank battle of WWI reserves called up in support of the retreat of the British include five hundred American engineers. Among them captain Colin Cahoon, a deeply religious Texan, is being treated by the enigmatic Dr Spindrift. Cahoon finds himself embroiled in a titanic struggle that will stretch the Texan’s religious beliefs, his sanity and his courage to breaking point. During the final year of The War To End All Wars, the future of all mankind will be decided.