When the only surviving heir to the Emperor of Austro-Hungary, Austrian Archduke Francis Ferdinand (Christopher Plummer) was killed by Gavrilo Princip, a Serbian nationalist, on June 28th, 1914, his death set in motion a chain of events which resulted in the First World War. This movie chronicles the events surrounding that death and it aftermath. The assassination gave the Germans and Austrians reason to fear that Russia was actively fomenting unrest in the Balkans, for Serbia was a bone of contention throughout the region.