When the Southern Kingdom was established, when his father and brother were killed by traitors, the day Xu Nianjin became an undercover agent to fulfill his father's entrustment, he knew that he could no longer walk in the sunshine as he did before. All he could do now was to help Lu Jin realize their common dream. Lu Jin lost his father in order to embark on this path and was unwilling to lose his lover again. (OE, the male and female protagonists are childhood sweethearts, no descendants from the sky, no mistresses)
Purpose: Patriotism and equality of the young generation