The film begins with a dying professor who leaves his great-nephew a collection of documents pertaining to the Cthulhu Cult. The nephew (Matt Foyer) begins to learn why the study of the cult so fascinated his grandfather. Bit-by-bit he begins piecing together the dread implications of his grandfather's inquiries, and soon he takes on investigating the Cthulhu cult as a crusade of his own. Sailors aboard the Emma encounter the Alert abandoned at sea. The nephew notes that Inspector Legrasse, who had directed the raid on cultists in backwoods Louisiana, died before the nephew's investigation began. As he pieces together the dreadful and disturbing reality of the situation, his own sanity begins to crumble. In the end, he passes the torch to his psychiatrist, who in turn hears Cthulhu's call.