Eun-yi, a middle-aged divorcee, is hired as an upper class family housemaid. But soon enough, master of the house Hoon takes advantage of his social position by slipping into her sheets. Hoon's visits become frequent and Byung-sik, an old housemaid, reports the affair to Hae-ra's mother, Mi-hee, who plots to give Hae-ra the control over her husband. Soon Eun-yi miraculously becomes pregnant and wants to keep the baby. This is discovered by the family and she's forced to have an abortion by Mi-hee despite Eun-yi's plea to let her keep the baby and leave the house. Mi-hee's plot backfires when Hoon scrutinizes her for terminating his child, even if that child is conceived illegitimately. Her forced abortion turns Eun-yi's mental condition for the worst and she decides to take the matter into her own hands.