Her husband, obsessed with gambling, had accumulated massive debt without his wife Yukika knowing. One day, Kobayashi arrives at their home demanding repayment and threatens the couple when they can't pay. He forcibly takes Yukika and forces her to work at a low-end soapland. Yukika is made to start a new life as a sex worker, walking this path until the debt is cleared. Thus begins her descent into the underworld.