A Uighur woman living in the Central Plains was named Li Jin by her savior, Li Shimin, the second son of Tang Guogong Li Yuan. Unexpectedly, a series of events happened. The two got farther and farther away, and she realized that she had never understood him. Then she became discouraged and married his brother. Li Jiancheng finally opened her heart to accept Jiancheng under the constant love and care, but received an order from her father-in-law Li Yuan to send her as a mission to the Turks, so she disguised herself as a man... Hatred between the country and the family, political intrigue, love between children, and twists and turns in love, how would Li Jin go on step by step in this troubled Sui and Tang Dynasty?