It tells the story of the downfall of the nation's top actress, Baek A Jin, and her hidden face. Baek A Jin, a sociopath, is someone who has a dazzling appearance and a kind personality, but she thoroughly punishes anyone who offends her by revealing her evil side. In order to get what she wants, she puts the people around her under her control and controls them, and is a person with the insight to see through the intentions of her opponents. Adapted from the webtoon "Dear X" (친애하는 X) by Ban Ji Un (반지운).