Lutèce is the ideal city of magic and romance. But behind a shadowy veil, an ancient menace lurks ...

Lutèce is a bright city of idylls and romance where no one goes hungry and everyone can wield magic, everyone, that is, except for young Commissaire Jules Janvier of the Police Judiciaire whose talent for sorcery is disabled. A temporary assignment to Art Crimes looks like easy work, but after a midnight encounter with the phantom thief called Le Chat Azur, things turn begin to turn strange.

Janvier discovers a secret world of horror and dark sorcery lurking behind the bright facade of his beloved city, and an evil mastermind who he thought was just a myth turns out to be all too real. Soon Janvier is forced to confront the awful reality of his world ... the Shadow Minister.