A man, Chonin Mitake, dies crazy after long agony, and his dead body is cremate. 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 that the house is cursed and possessed by the spirit of Baron Tominaga. The visitors - hospital's chief physician prof. Mitake (dead Chonin's father), his daughter Ohara,doctor Yamashita, his fiancée Linda, lawyer Daimyo and Suzy Akemi (Chonin's ex-lover) - they don't believe the curse. Despite the intervention of a medium, the guests begin to die one to one...