Mu Zhaoyang, Princess Consort of Loulan and Grand Princess of the Great Liang, returns to the capital to uncover the mysterious death of her best friend, Empress Tong Hua. Using her intelligence, courage, and determination, she investigates the case layer by layer and exposes the truth: the false emperor Mu Chengye forged the imperial edict to usurp the throne, and his obsessive suspicions and misunderstandings led to his wife's death. She destroys the dark forces responsible for harming innocent people. In the end, she helps the wise Prince Duan ascend the throne, clears the victims' names, and retires with her mission accomplished, returning to the Western Regions.