The female students at a catholic school in Forest Glen are being brutally slain. Is a serial killer at work, or is something supernatural to blame? Lisa and Mona decide to investigate when their friends start dropping like flies. What they discover is a grisly secret guarded by secret forces at work against what is good and pure. They persevere through a series of bizarre occurrences that lead to a coven of secret witches and, ultimately, the Dark One himself...