London is burning. German bombs are decimating British homes and the dead lie in heaps. But this Blitz has nothing to do with World War II. This little-known story of a terror bombing campaign on the capital took place during the First World War. For 18 months the carnage was delivered by a machine straight from the pages of science fiction. The Zeppelin, the biggest flying machine ever to have existed, delivered a deadly payload straight to the heart of a nation and, for a time, there was nothing the British could do to stop them. This new kind of terror campaign rewrote the rules of war. For the first time in history, innocent civilians were bombed in their homes in a ruthless attempt to break a nation's morale.