The beautiful girl Lisa (Sophie Marceau) lives with her grandmother in a building opposite the Louvre. The renovation of the Louvre often causes problems in the old building, so Lisa gets to know the kind electrician Martin (Frédéric Diefenthal). A certain construction accidentally opened up the Louvre tunnel and the elevator room of the building, so Lisa and Martin entered the Louvre at night and walked into the laboratory where scientists studied ancient Egyptian mummies. Lisa looked at a mummy corpse, but unexpectedly, the ghost in the mummy entered her body. From then on, every night, Lisa was driven by ghosts to wander in the Louvre, searching for ancient Egyptian amulets. The curator invited experienced retired policeman Flack (Michel Serrault) to investigate the ghost incident in the Louvre, and Granda (Julie Christie), an Egyptology expert from the UK, also helped a lot. But can everyone's efforts really subdue the powerful ghost in Lisa's body?