Perdition is a small mining community located in the Appalachian hills of Pennsylvania. In 1904 Abraham Monroe found a mystical spell book written by his ancestor Malcomb Monroe titled Visions of a Dead Priest. Invoking the book's magic, Abraham opened a doorway that enabled the alien entity M'nagalah access to this world. M'nagalah took up residence in a mine shaft known as Tunnel 13 and began a seventy-plus year reign of terror upon the town.