Compelled by the inheritance of a mysterious box of letters, American aesthete Felix Pfeifle begins the journey of a lifetime to reach the source of the correspondence: the last heir of the Holy Roman Emperors, aging Archduke Otto von Habsburg. The quest takes Felix across America , over the Atlantic and beyond.
| Actor | Role |
|---|---|
| FFelix PfeifleSelf | Self |
| EEmpress Zita of AustriaSelf | Self |
| OOtto, Crown Prince of AustriaSelf | Self |
 Tatyana YassukovichSelf | Self |
| RRobert DassanowskySelf | Self |
 Archduke Franz FerdinandSelf (archive footage) | Self (archive footage) |
| EEmperor Franz JosefSelf (archive footage) | Self (archive footage) |
| EEmperor Karl ISelf (archive footage) | Self (archive footage) |
| RRegina von HabsburgSelf (archive footage) | Self (archive footage) |
| DDuchess Sophie von HohenbergSelf (archive footage) | Self (archive footage) |