Intro. Taehyung is the CEO of Rockwell Group, cold man, rich, handsome, and shrouded in luxury. Behind that, he was only soft to his wife, Minji, a famous fashion designer. They are married five years, but have not been blessed with children. Taehyung's parents continued to demand grandchildren, making Minji depressed. Secretly, Minji took a desperate step: he introduced you, a beautiful girl with brown-eyed and long black hair, to be a substitute mother who was about to give birth to Taehyung's child. Taehyung was furious. For him, there are no other women besides Minji. But since the first meeting, there was something in you who caught his attention, making him shaky. The story also developed into a conflict of triangle full of love, loyalty, and betrayal - between Taehyung, Minji, and you - who were trapped between family ambitions, sincere love, and increasingly growing feelings.