The Mitarai family are wealthy and they have run a hospital for generations. One day, their home burns down in a fire. 13 years later, Murata Anzu, from a housekeeper agency, is hired by Mitarai Makiko. She is the second wife of Mitarai Osamu. Murata Anzu soon begins to work at the Mitarai’s home as a housekeeper. She has a secret purpose to work in their home.