Soo-hyeon and Hye-ji are sitting on a pile of debt thanks to their husband and father who ran away in the middle of the night. Tae-san the loan shark demands the money no matter what. He r the mother and daughter and requires them to join prostitution. They survive day by day selling themselves until one day, Tae-san suggests a way they can clean slate over one night and that is for the mother and daughter to have the most extreme sex with one man.