Who Is the Real Heiress?

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.