Three years ago, he married into the Fang family. On his wedding night, his fiancée, Fang Yan, caused a fatal hit-and-run accident while drunk driving, and he took the blame, serving a five-year sentence. By chance, he didn't go to prison but was taken away by an old marshal from the Northern Border and went to war. Three years later, he returns as a Mad Dragon, a master of medicine and martial arts, only to find that everything has changed. His father was in a car accident and lost a leg. His older brother and sister-in-law were robbed and killed. His beloved niece has late-stage cancer! And his fiancée, Fang Yan, is getting married in seven days!