In the final days leading up to the collapse of the Austro-Hungarian Empire, a daring theft occurred at the treasury of Vienna’s Hofburg Palace, where invaluable crown jewels were stolen. Among the prized items were Empress Elisabeth’s diamond crown and Emperor Rudolf II’s Austrian imperial crown. For over a century, this audacious heist has captivated historians, monarchists, and republicans alike. While the crowns eventually made their way back to Vienna, their full story remains unclear, particularly regarding whether they still contain their original diamonds. This film investigates the curious events of the lost Austrian crown jewels, uncovering the secrets of their fate.