The story of a vengeful ghost (which spawned both a popular silent thriller and a mid-'60s TV miniseries that drew record ratings in France) returns to the big screen in this adaptation of the story by Arthur Bernede. A collection of artifacts from an archeological dig in Egypt are brought to the famous Louvre museum in Paris, and while experts are using a laser scanning device to determine the age of a sarcophagus, a ghostly spirit escapes and makes its way into the museum's electrical system. Museum curator Faussier (Jean-Francois Balmer) brings in a noted Egyptologist, Glenda Spencer (Julie Christie), to examine the findings, and she announces that the mummy inside the coffin was actually the evil spirit Belphegor. Lisa (Sophie Marceau), who lives across the street from the museum, follows her runaway cat into the museum after closing time, where she is accidentally given a shock that sends the stray spirit into her body. Soon, Lisa is disguising herself as Belphegor and making off with the rare Egyptian treasures on display at the museum, convinced that they are rightfully hers. When "Belphegor" proves more than a match for the Louvre's security forces, renowned detective Verlac (Michel Serrault) is brought out of retirement to find out why the museum's Egyptian collection has been shrinking. Belphegor: Le Fantome Du Louvre enjoyed the distinction of being the first feature film to be shot in part inside the world-famous museum.