This three-part political thriller follows the catastrophic chain of events leading up to World War I from the assassination of Archduke Franz Ferdinand on June 28, 1914 to Britain's declaration of war on Germany 37 days later. This tense and gripping mini-series set amongst the corridors of power in Whitehall and Berlin tracks the unfolding crisis through the eyes of leading politicians and civil servants struggling to prevent the world's first global war.