ONE

When Elena is kidnapped on the night before her wedding, her younger sister Y/N is forced to marry her fiancé, Kim Taehyung, in her place. Taehyung resents Y/N, making her life a constant struggle. Just when Y/N begins to uncover the truth behind Elena's disappearance, Elena returns. But instead of a joyful reunion, Elena harbors hatred towards Y/N for marrying Taehyung.