Plot Summary:When a Prince is ignored by the young widow, Princess Feodora, he plans revenge by paying a masked acrobat, "Mister X", to pretend to be a nobleman, woo, and marry her, so that she will be disgraced in society as "the circus princess".
A circus comes to the city, the main star of which is an air gymnast, performing dizzying stunts - the mysterious Mr. X. He always hides his face under the mask. The audience, especially the women, are burning up with curiosity, but Mr. X is relentless and continues to carefully hide his face......