Beasts Cage

Natsuko, a young waitress working at a bar, has agreed to be with Mr. Uehara, a wealthy art teacher, because he paid off her ex-husband's debt. Although Mr. Uehara accepted this arrangement, he grew suspicious that Natsuko was being unfaithful by continuing to see a man named Seiji. In response, Mr. Uehara decided to punish Natsuko in what he called an "artistic" manner. He restrained her and confined her in the basement of his home, a space he referred to as "the beasts' cage," where she was subjected to various forms of torture and sexual abuse involving sadomasochistic practices.