A young bar waitress, Natsuko has accepted to many Mr. Uehara, a rich art teacher. It's because Uehara could pay the debt for Natsuko's ex-husband. Mr. Uchara agreed with the terms but suspected that Natsuko betrayed him for money and continued to meet Seiji. Mr. Uehara determined to punish his young wife in his "artistic� way. He tied her up and locked her in the basement of his house, or better described as "the beasts' cage�, a place where a "bitch� was tortured and sexually abused in various SM ways