At first, the refined literati of the Southern Song saw Lu Sanlang as a treacherous villain, a lapdog of the corrupt Chancellor Qin Hui, a disgrace to the Lu family, and a shame to the scholarly world. They wanted nothing to do with him.
Later, they saw Lu Sanlang as a gentleman of grace, a man of exceptional talent, a chancellor who saved his age, upright and principled, and a devoted lover. They considered it the greatest fortune of their lives to know him.
In short, after a modern person becomes Lu You, the history of the Southern Song loses a great poet full of learning and gains a young statesman who serves the country and its people. It loses a tragic romance that leaves people sighing with regret and gains a model couple whose love remains a favorite topic of conversation.
The main story is about restoring the Southern Song, with court politics and warfare. The subplot follows Lu You's marriage and romance with Tang Wan. A serious story, very serious!
Also, changing from a woman into a man isn't particularly meaningful. It's just the author indulging a desire to be a man, so don't treat it as a dealbreaker. (^_^)
Theme: Save the nation and revive the Song.