Song Yaoyao, a concubine-born daughter of a high-ranking minister, and Prince Regent Xie Xuan are unexpectedly reborn. Song Yaoyao returns to the day she first entered the Prince Regent's residence. To avoid the tragic fate she suffered in her previous life, she decides to stay by Xie Xuan's side. Xie Xuan initially makes plans solely to protect himself, but her presence gradually heals his heart. Together, they settle scores with their cold-hearted relatives, overcome numerous obstacles and secret schemes, and quell political turmoil at court. As they grow and redeem each other, they ultimately find happiness together.