An historical depiction of the events preceding the political murder of Archduke Franz Ferdinand, would-be emperor of the Austro-Hungarian throne, in Sarajevo on June 28th, 1914.

A British citizen by the name of George Reiner (Jirí Sovák) arrives at Prague airport. He was once a Czech safe-breaker, and has now returned home after thirty years to steal twenty-dollar gold coins still kept in the safe at a private villa in Pilsen whose owner fled to the West.