A rare collection of artifacts from an archeological dig in Egypt are brought to the famous Musée du Louvre in Paris. While experts are using a laser scanning device to determine the age of a sarcophagus, a spirit escapes and makes its way into the museum's electrical system. Museum curator Faussier (Jean-Francois Balmer) brings in 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.