In Peiping of the Republic of China, officer Lu Chengyuan was cursed with immortality and returned under an assumed name to silently protect his childhood sweetheart, Su Wanqing, the eldest daughter of the Su family. Su Wanqing was frequently haunted by nightmares of tragic deaths in her previous life, her memory was incomplete, and she was both familiar with and alienated from Lu Chengyuan. At this time, the Su family is targeted by traitors, and the crisis of the family and the country is intertwined with the secrets of the two people's past lives. Lu Chengyuan is dealing with political opponents and battlefield crises while hiding the secret of immortality. In the process of searching for memories, Su Wanqing gradually uncovers the sacrifices of the two people in their previous lives and the fetters of this life, and join hands to protect the country and each other.
