This story follows Qing Yue, the third daughter of the Celestial Emperor, as she descends to the mortal realm to undergo a trial. Passing through an ancient Shu forbidden land, she encounters the Blood Demon, who breaks free of its seal. To prevent the people of ancient Shu from being devoured, she fights alone against the Blood Demon as it is about to break through the seal and emerge from the mountains. With help from the guardians of ancient Shu, she badly wounds the Blood Demon. But while Qing Yue is gravely injured, the Blood Demon knocks her beyond the boundary between the two realms. Her immortal body is ruined and her primordial spirit is wounded. With no other choice, her primordial spirit enters the body of the daughter of the chancellor of Luoshui City, which was discarded at a mass grave before it had even grown cold. There, she is reborn. From then on, she becomes entangled in worldly conflicts and encounters a trial of life and death: Su Mingze, a prince of the current dynasty (Xiaoyu Jun). While facing family struggles in her role as the chancellor's daughter, she must also confront the same trial of life and death...