The scheming concubine-born daughter of the Minister's household, Bai Xiyue, caused the death of her legitimate sister Bai Xiyao, and seduced Duke Yun Yichen, eventually becoming empress. However, she was poisoned and died suddenly during the coronation ceremony. After being reborn with all her memories, this time as her sister Bai Xiyao, she finds herself face to face with the younger, ruthless version of her former self. Now, she must endure the very schemes she once used on others, strive to protect herself while atoning for her past sins, and navigate the tangled web of love and destiny.