The second sequel to the landmark 1973 horror film The Exorcist, this horror outing has little to do with the previous two. This time, the story centers on a police detective who for the past 15 years has been obsessed with solving a series of murders that occurred on the night of the first exorcism. These murders were exceptionally brutal and seemed to be the work of a serial killer who was executed in a prison that very night. A pair of priests assist with the gumshoe's investigation.