When doctors fail to cure the young and beautiful Claire Raven, who for inexplicable reasons seems to have fallen under a spell, Professor Mors, an expert in the field of hypnosis, is called in to help.

French aristocrat falls for Russian nightclub singer, gets involved in underground Russian revolutionary movement. Part 1 and 2 were re-edited in the surviving copy named Daughter of the night.

A young man realizes that his fiancée is asking the Mystery Prince for advice on the conduct of his future household. The Mystery Prince is a radio presenter adored by his listeners. To get rid of this cumbersome character, the young man makes one of his comrades pass for the presenter, who has become the worst of cads.

French aristocrat falls for Russian nightclub singer, gets involved in underground Russian revolutionary movement. Parts 1 and 2 were re-edited in the only surviving copy named Daughter of the Night.