Dragon Zhannan, a military hero who once led the Northern Expedition, decides to retire in a rural village to live a peaceful life after the war. To discipline his son, Long Xiaolong, he hides his identity and secretly protects him while teaching him medicine and how to fight against evil forces. However, Long Xiaolong's actions anger the Emperor, Prince Mu. The Emperor confronts Dragon Zhannan, but after understanding the situation, he apologizes and resolves the conflict, acknowledging Dragon Zhannan's excellent parenting and promising to educate his own son more carefully.