Austrian actress Mady Christians stars alongside German matinee idol Willy Fritsch in this adaptation of the Oscar Straus operetta about a Prince who, after falling for a Viennese girl, becomes obsessed with the city and its customs.

Eva lives in the sinister Tower with her father, a mad inventor, and her grandfather. The aviator Wilfred Durian and his lovely wife live nearby in the town. But Durian's famous flight across the Australian desert was not all it seems... and when his 'dead' partner Arved Holl is rescued by Eva and comes to claim his former fiancée's hand, the whole house of cards is about to come tumbling down. Meanwhile, Eva's own family history is not quite as she had always believed...

Expressing post-war cultural internationalism, this silent film follows the mysterious Orchid and the man who loves her.