It's Paris in the year 2000 and a mummy with evil powers has unleashed a phantom named Belphegor in the famed Louvre Museum. At night, Belphegor unleashes havoc throughout the landmark, as he alternates between being terrifying and human and seemingly invincible. His adventures allow us to see the other side of the Louvre as Belphegor moves from basements to exhibition halls to research labs to the offices of the security guards.