A man's affair with his family's housemaid leads to a dark consequences. Eun-yi is hired as an au pair for Hae-ra (pregnant with twins) and her rich husband Hoon. Eun-yi's primary task is watching the couple's young daughter, Nami. Eun-yi is eager to connect to Nami, who gradually warms to her. Hoon begins to secretly flirt with Eun-yi, enticing her with glasses of wine and his piano playing, and they eventually begin a sexual relationship. Despite the affair, Eun-yi is still warm and friendly to Hoon's oblivious wife, Hae-ra. She even expresses enthusiasm and delight at the progress of Hae-ra's pregnancy.
A piano composer's family moves into a new house; when his pregnant wife collapses from working to support the family, he hires a housemaid to help with housework.
When an orphaned Vietnamese girl is hired to be a housemaid at a haunted rubber plantation in 1953 French Indochina, she unexpectedly falls in love with the French landowner and awakens the vengeful ghost of his dead wife... who is out for blood.
Eun Sang-Chul (Lee Sung-Jae) and his four children encounter difficulties after the sudden death of his wife. Then, a suspicious housekeeper named Park Bok-Nyeo (Choi Ji-Woo) appears. Because of the housekeeper, Eun Sang-Chul and his children faces various cases and family members who hate each other begin to experience love and reconciliation.