Deputy Langley tracks a kidnapped girl to an abandoned ghost town. However, the town is not abandoned, but haunted by the spirits of an outlaw, Devlin, and his gang, who hold the equally deceased townspeople hostage until the outlaws can be killed by a lawman.

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.