The City of Lights becomes the City of Frights when American tourist Victoria (Shannyn Sossamon) visits her sister Carolyn (pop star turned actress Pink) and gets lost at a party in the Catacombs, the vast 200-mile labyrinthine network of tunnels that lies beneath Paris. Confusion soon gives way to terror as Victoria begins to suspect she's being chased -- and a swirling rumor about a monster isn't helping matters either.