A good personality, plenty popular, rich, and without a fault, the real G Conglomerate's perfect daughter, Gu Do-Yeon. However, Do-Yeon’s step sister, Gu Iseo, is crass and unpleasant. Even considering that, Do-Yeon was lucky and born with a silver spoon in her mouth, just where in the world can you find a perfect person like her? But in the end, Do-Yeon’s weak point is discovered. Hiding out in her apartment, Iseo sees a version of Do-Yeon that is completely different from her usual self.