The 28-year-old Jiang Xushu died of illness and mistakenly wore the body of the 15-year-old Jiang Yueyan, the legitimate daughter of the Marquis of Jiangning. She was given the title of Crown Princess by the Empress Dowager when she was a child, and the marriage contract will be fulfilled when the prince is still young. After the heroine came, she wanted to get rid of the prison of the imperial city and the fate of ancient women who could not marry independently. Fortunately, she disguised herself as a man to do business, and unexpectedly met the young general Fu Shiyan... In order to reject the imperial order of finger-marriage, she worked step by step. When she was about to successfully cancel the engagement, she was given a marriage contract by the emperor and was given to the reborn King of Yue, Huangfu Junyue. Therefore, she was involved in a conspiracy to compete for imperial power...