For centuries the Roman Catholic Church has employed a select few to investigate the most extreme cases of demonic possession, haunted places, and paranormal activity. Often, the calling of an Investigator is passed down from father to son. After surviving a tragic accident, seventeen year old Danny Lambert is sent to live with his father, Paul, who is an Investigator for the Church. At first Danny resists the calling to become an Investigator, but after the horrors he sees, he agrees to begin training with his father. Danny and Paul are given their first assignment: the haunting of a house...