A man, Chonin Mitake, dies crazy after long agony, and his dead body is cremated. His widow Yoshi, investigating on the past of her husband, goes to the mansion where he had lived, a building Leftly nicknamed "Satan's Pit" (a suggestive statue of Satan is situated in the atrium of the mansion) managed by a hunchbacked caretaker. Soon some visitors reach the house. the hunchbacked keeper warns...