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