Miles of twisting catacombs lie beneath the streets of Paris, the eternal home to countless souls. When a team of explorers ventures into the uncharted maze of bones, they uncover the secret of what this city of the dead was meant to contain. A journey into madness and terror, it reaches deep into the human psyche to reveal the personal demons that come back to haunt everyone.

Now in Paris with her parents who are filming their TV show about the world's haunted cities, Cassidy Blake (who can see ghosts) and her friend Jacob (who is a ghost) are alert for trouble, especially when the filming takes them into the underground Catacombs, the empire of the dead, where Cassidy accidentally awakens a powerful poltergeist spirit--one whose mystery she must solve before his power in unleashed on the whole city.--

"Deep within the bowels of Paris, Noé and Vanitas race through the catacombs with an elite team of chasseurs, the Church's anti-vampire unit, in hot pursuit. Their search for the missing vampires takes the pair down a path all too familiar to Vanitas, bringing them face-to-face with not only an overwhelming curse-bearer, but also with Vanitas's past. Confronted by the horrific menace, what will Noé and Vanitas fight for, and whom will they save...?"...