One hope to improve the situation would be a marriage to the Russian Grand Duchess Olga, who sent him a letter saying she is determined to marry him despite not knowing him, and against the opposition of her brother, the Crown Prince of Russia.

Businessman Bekker offers a substantial sum of money to exploit a sulphur mine but the Grand Duke is worried it would have negative effects on his subjects.

Thief-detective Phillip Collin, passing as Professor Pelotard, tries to retrieve from Markowitz incriminating letters written by Congressman Isaac.

Marcowitz boards the Russian Crown Prince's warship and convinces him to go to Abacco by showing him his sister's (fake) letter.

Once Abacco, and after a brief skirmish, the Grand Duke and Collin overcome the self-proclaimed president of the island nation and his accomplices.

It was shot from May to August 1923 at UFA's Tempelhof Studios in Berlin, on the sets built by Rochus Gliese and Erich Czerwonski.