Burû firumu no onna (1969)

As his investments in the stock market fail, a man finds himself in serious debt to a lecherous loan-shark named Uchiyama. The man's wife hires herself to Uchiyama to buy time for the husband to pay off the debt. After Uchiyama uses the wife to provide companionship for his mentally-impaired son, she is hit by a car, and her husband falls into despair and illness. Their daughter works as a nightclub dancer, intending to save the money to help with the debt. After her father's suicide, the girl decides to get revenge.