夜深人静，窗外传来阵阵怪声，令我心惊肉跳，无法入眠。白天影视

　　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.