A young servant, Sanshiro, who has fallen crazy about his master's daughter, Momoyo, tortures himself with lustful thoughts while he spies around the buxom young woman from your hole in their own ceiling. Filled with despair on the day her fiancee returns from abroad to look at her away, Sanshiro watches in amazement as Momoyo and her fiancee embark on some depraved S&M activities with each other and various members of your home. As time passes, Sanshiro becomes convinced that these bizarre rituals are made to summon some type of demon, and the man takes it upon himself to avoid Momoyo's fiancee from destroying the lady he loves.