Ever since her near-fatal drowning, Cassidy has been able to pull back the "Veil" that separates the living from the dead and see ghosts, not that she wants to, and she was really looking forward to a ghost-free summer at the beach; however her parents are going to start filming a TV series about the world's most haunted places, starting with Edinburgh with its graveyards, castles, and restless phantoms--and Cass and her personal ghost companion,...

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.--