The modern Xue Qingyin accidentally traveled through time and became the female supporting character who met a tragic end in the ancient novel "The Only Favorite Princess". In order to change her destiny, she gave up the male protagonist of the original book and approached the ruthless King Xuan He Junting. She just wanted to use the opportunity to save her life and become a rich widow when he "dies early". At this time, the palace fighting system is activated, requiring her to complete tasks such as gaining the emperor's favor and overthrowing the imperial concubine. Completing this will unlock new skills and props. However, the concubines in the harem were jealous of the attention she received from He Junting and constantly framed her. The heroine enters the palace for the first time and is not familiar with the rules of the palace. It is difficult to complete the tasks. The strict hierarchy of the palace also limits her development. The heroine relied on wisdom and systematic help to gain a foothold in the court. While getting along with He Junting, He Junting misunderstood that she loved him deeply and treated her tenderly and dotingly. But the heroine's initial calculation caused a misunderstanding after He Junting found out. Later, when He Junting's life experience was exposed, he secretly took revenge, and the heroine became his helper. The heroine is in a dilemma between using the system to achieve her goals and sticking to her true feelings for Huo Junting. In the end, Lord He Junting ascended to the throne of God, the heroine became the queen, and the two rewrote the tragic ending.