Four episodes chronicle a mysterious phantom who appears in the Musée du Louvre in Paris at night. Neither guards nor police are able to make an arrest. But a curious young man tries to break the ice and discover what drives the creature and its activities.

• Juliette Gréco
• Isaac Alvarez
• Christine Delaroche
• René Dary
• François Chaumette
• Sylvie
• Paul Crauchet
• Muni