Rémy (Robert Lynen), a stolen child is adopted by a wandering singer. With him and his trained animals, Rémy travels the roads of France. But his adoptive father dies and Remy, who has knowledge of a boy who knows something of his history, sails for England to find his mother.
Belphégor deals with a series of mysterious appearances by a masked-and-robed figure in the Louvre; a security guard is murdered, and a later police trap is foiled when the phantom—“Belphégor” (the name of a legendary demon)—uses knock-out gas. Journalist Jacques Bellegarde of “Le Petit Parisien” (the real-life newspaper which published the original story in serial installments), investigates, and eventually discovers famous detective Chantecoq and his vivacious daughter Colette are also on the case.
Desire brings out the worst in an actress' suitors-- One a well-to-do patron of London's theatre set, the other a lovestruck loner on the verge of penning a play dedicated to her.
In Granada in Spain, Sibilla works as a dancer in a squalid cabaret called El Dorado, struggling to earn enough to care for her sick child. The boy's father Estiria, a prominent citizen, refuses them both help and recognition, fearful of jeopardising the engagement of his adult daughter Iliana to a wealthy nobleman. Iliana however slips away from her engagement party to meet her real lover Hedwick, a Swedish painter. Sibilla, in desperation after a further rejection by Estiria, sees an opportunity to blackmail him by locking the lovers overnight in their meeting-place in the Alhambra.