Separated sisters Kim Yun-hui and Kim Ji-won grow up in different worlds. Ji-won becomes the heiress of a wealthy family, while Yun Hui builds her own company overseas. When Ji-Won's death is ruled a suicide, Yun-hui suspects murder. She assumes Ji-won's identity to uncover the truth. But as she gathers evidence against Ji-won's corrupt husband, the real Ji-won returns—having miraculously survived.
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