As a modern man, Lu Chen encountered a car accident on the way to his wedding and honeymoon and traveled to the Tang Dynasty. He met Princess Changle who had escaped from marriage and had the same appearance as his wife. Lu Chen relied on his modern knowledge to make Li Lizhi gradually fall in love with him. However, due to his love for a modern wife and the obstacles of Li Shimin, Lu Chen never dared to face his feelings for Li Lizhi. It was not until the day Li Lizhi died that he finally realized it. Just when Lu Chen was desperate, Lu Chen's modern wife Li Xuanhua also time-traveled into Li Lizhi's body. However, due to Li Xuanhua's time-travelling, Li Lizhi's soul was also preserved and she could only control her body at night. This situation of Li Xuanhua during the day and Li Lizhi at night made Lu Chen miserable. Because he could not let go of his guilt for Li Lizhi and Li Xuanhua, so in order to save his two lovers, he embarked on the road to unify the world under the guidance of Yuan Tiangang.
