Sergius, a student in Paris, is called upon to ascend the throne of Deliria, and the Duke of Onnandoff comes to announce the fact accompanied by his beautiful young Duchess. The Prince, however, has gone off for a night's merrymaking in Paris, and at a popular cafe he meets and falls in love with a beautiful ex-dancer, who is none other than the Duchess of Onnandoff, who is paying a surreptitious ...