Harley Warren is an expert on violent criminals and assists the FBI in their profiling and pursuit of criminals who tend to be on the bizarre side. Warren believes in exploring the darker side of man, especially those who seek to live in the shadows of normalcy. When Warren reads The Necronomicon, a book that can reveal the darkest and oldest mysteries of the stygian unknown, Warren wastes no time packing up his reluctant chronicler and assistant, Randolph Carter, to explore the site.