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.

A drama about a housekeeper Park Bok Nyeo, who gets hired to work for a family which has just lost its mother, leaving just the father and 4 children. But, she's strange. She is unsociable housekeeper who is perfect in what she does around the house but doesn't smile or show her feelings due to her mysterious past. Bok Nyeo will help the family healing process and rebuild their bonds.