A seemingly sickly heroine who is secretly ruthless, bitter and bent on revenge, but whose revenge goes awry, VS the young general, the last surviving heir of the General's estate
"Have you heard? The last young master of the General's estate is looking for a live-in son-in-law."
"I have. Sigh, I hear that young Master Ruan came back from the battlefield with his meridians completely severed. No one knows how long he'll live, and that enormous General's estate doesn't even have a penny to its name, yet they still want to find him a son-in-law."
"What a pity, the Ruan family has always been loyal to the country. Anyone who goes will be a fool."
The gaunt fool in the distance: Heh.
Theme: Serve the country with unwavering loyalty.