A young woman in Paris goes to a party in the enormous labyrinth of limestone tunnels beneath Paris. When she becomes separated from her friends, she is convinced something is chasing her through the dark tunnels.

In the 17th century, an order of monks in Italy capture and entomb a demon that has possessed a member of their group. 400 years later, school teacher Elizabeth Magrino visits the monastery in order to do some research. What she and the current monks do not realize is that the evil hiding within the catacombs has unwittingly been released.

A rich woman who uses meditation to deal with pain is visited by her niece who returns from Paris. The woman can be a handful and one of her employees suggests to her husband that he kill her freeing them both. When an affair starts between the husband and the niece murder becomes a real possibility. However some people won’t stay dead.