The Doctor Concubine Made Trouble

An undercover intelligence agent was betrayed by his teammates, and his soul passed through the country of Liang. It doesn't matter that the position of the Crown Princess has been snatched away. Her father doesn't care, but her mother is weak, so she is allowed to serve the seventh prince who is seriously ill without any name or status? It was clear that she was to be buried with him. Fortunately, I know medical skills, and this Seventh Prince is not an incurable disease... … Wait, this Seventh Prince is not simple! God, what kind of guy did I save?