Nozomi Takamura thought she has 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 with Erika Mido, the heiress of a major corporation. While Nozomi tries to accept the reality, she discovers that Ryoichi and Erika planned the accident to kill her. Determined to get her revenge, Nozomi changes her name and appearance, and infiltrates their home as the "most terrifying housekeeper".