April, 1915. The First World War continues its relentless march. Among the British troops are the Reavley siblings. Joseph, the eldest of the three, works as a chaplain in the trenches, while Judith is conductive and translator of the general in command. Matthew participates from his post in the intelligence services. Both Joseph and Matthew continue to investigate the strange death of his parents, a fact associated with a possible plot in two of the world powers, England and Germany.