Nozomi thought she had been living a happy life with her husband, Ryoichi, until she got involved in an accident during a trip while pregnant. Upon waking, Nozomi finds out that four years have passed and she had a stillbirth. Not only that, her husband, Ryoichi, has already divorced her and is currently married to Mido Erika, the heiress of a major corporation. While Nozomi tries to accept the reality, she discovers that the accident was a plan by Ryoichi and Erika to kill her. Determined to get her revenge, Nozomi changes her name and appearance and infiltrates their home as the "most terrifying housekeeper".