Diplomatic leader Shang Gong had four daughters. During the Civil War, the fourth daughter Shang Wangshu went to the north alone. She and the man who stood tall in the war defended the same country. This man's son, who is four years younger than her, does he have the same feelings for her as a son has for his stepmother? In the south, there is also the handsome son Ye Mingzhong. How does she deal with it and how does she keep her happiness?