Taeyang Group is the largest conglomerate in South Korea. The Choi family who runs Taeyang has supposedly been under a curse for a hundred years that the first bride of the eldest son will always die. When the wealthy heiress Jang Yi-kyung disappears right before her wedding to chaebol heir Choi Kang-joo, Na Doo-rim, a lookalike impostor, is brought in to take her place. But unlike the cold and calculating Yi-kyung, Doo-rim is sweet and sunny, and Kang-joo falls genuinely in love with her. As the wedding plans progress, Kang-joo and Yi-kyung's mothers both scheme and plot behind the scenes.