The likeable and carefree Grand Duke of Abacco is in dire straits. There is no money left to service the State's debt; the main creditor is looking forward to expropriating the entire Duchy. The marriage with Olga, Grand Duchess of Russia, would solve everything, but a crucial letter of hers about the engagement has been stolen. Besides, a bunch of revolutionaries and a dubious businessman have other plans regarding the Grand Duke. With the intrusion of adventurer Philipp Collins into the Grand Duke's affairs, a series of frantic chases, plots and counter-plots begins.
| Actor | Role |
|---|---|
 Harry LiedtkeRamon XXII, Großherzog von Abacco | Ramon XXII, Großherzog von Abacco |
 Adolphe EngersDon Esteban Paqueno | Don Esteban Paqueno |
 Ilka GrüningAugustina, die Leibköchin | Augustina, die Leibköchin |
| HHugo BlockJoaquino, der Kammerdiener | Joaquino, der Kammerdiener |
| GGuido HerzfeldSemjon Markowitz, ein Wucherer | Semjon Markowitz, ein Wucherer |
 Hermann VallentinHerr Bekker | Herr Bekker |
 Georg August Kochder Gefährliche | der Gefährliche |
 Max Schreckder Unheimliche | der Unheimliche |
 Hans Hermann Schaufußder Bucklige | der Bucklige |
 Walter Rillader Ehrgeizige | der Ehrgeizige |
 Alfred AbelPhilipp Collin, alias Professor Pelotard | Philipp Collin, alias Professor Pelotard |
 Julius FalkensteinMr. N. Isaaks | Mr. N. Isaaks |
 Mady ChristiansGroßfürstin Olga von Rußland | Großfürstin Olga von Rußland |
| RRobert ScholtzBruder der Großfürstin | Bruder der Großfürstin |