The story is loosely based on a 1926 short story by Jun'ichirō Tanizaki, published in Chūōkōron in September 1926. The film opens as an artist and a young woman are in a dentist's waiting room. Though he is attracted to the woman, he says nothing to her. They are later in the same examining room. When the artist is given an anaesthetic, he begins to imagine a series of scenes in which the woman undergoes various forms of sexual abuse at the hand of the dentist, including rape and torture. When the artist recovers from the anaesthetic, he finds bite marks on the woman's breast, indicating that he may not have been hallucinating.
http://en.wikipedia.org/wiki/Daydream_(1964_film)
