A mentally disturbed Professor checks himself into a hospital where he meets other patients suffering from schizophrenia as a result of extramarital affairs. He comes across a story about a man who was killed by his mistress - a prostitute named Myung Ja. Apparently Myung Ja was raped by a married man who incidentally suffered from impotence, but the assault turns into a prolonged love affair.
After much contemplation, Myung Ja asks her man to be his concubine. Surprisingly, the man's wife agrees to it and even arranges Myung Ja to live with them in exchange for curing her husband's potency. But what no one has yet to see is that something horrific is heading their way.