In an abandoned house in Poughkeepsie, New York murder investigators uncover hundreds of tapes showing decades of a serial killer's work.

In their new overseas house, an American family soon finds themselves caught in the middle of a coup, and they frantically look for a safe escape from an environment where foreigners are being immediately executed.

When a team of explorers ventures into the catacombs that lie beneath the streets of Paris, they uncover the dark secret that lies within this city of the dead.