夜幕降临，黑影悄然逼近，心惊肉跳，寒意骤生。他们都想把我关小黑屋

　　A pathologist, Dr. Warren Chapin (played by Vincent Price), discovers that the tingling of the spine in states of extreme fear is due to the growth of a "tingler"—a spinal parasite which can kill the host unless it is destroyed by screaming.