"Actually, I'm not Ruoxi, I'm Zhang Xiao. I don't belong to this world. I'm afraid that one day, I will still be able to leave here involuntarily, just like I didn't want to come here." "If you leave involuntarily, no matter where you go, I will look for you." He persistently appeared in the modern world 300 years later to reunite with her, and saw her entangled with their love and hate, who had only left memories in this world...