Ten years ago, Li Xiangyi, the leader of the Sigu Sect, was the leader of the world with the Xiangyi Taijian and was the light of the righteous martial arts. However, due to an appointment with Di Feisheng, the leader of the Golden Yuan Alliance, to fight in the East China Sea, the two masters disappeared on the vast blue waves.Sigumen and the Golden Yuan Alliance also suffered losses and gradually disappeared from the world.Ten years later, Li Lianhua, a country doctor dragging a Mysterious Lotus Casebook around the world, accidentally got the title of a famous doctor. He didn't want to get involved in the world, so he got involved in it.

Fang Duobing, a hot-blooded young man who dreams of being a knight-errant and bringing peace to the world, realizes that Li Lianhua is not a simple person, so he vows to find evidence of Li Lianhua's crime of impersonating a famous doctor. Di Feisheng, who has always regarded Li Xiangyi as a strong enemy, recognizes Li Lianhua after he returns to the world.The unassuming traveling doctor Li Lianhua is Li Xiangyi, so how can he let him go so easily?

After a series of cases, the three of them actually formed a deep friendship while laughing and scolding each other in the process of solving the case.Li Lianhua and Di Feisheng, who had no interest in the world, rekindled their passionate passion under the guidance of Fang Duobing, a young man who took the safety of the world as his own responsibility. The three of them fought hand in hand to solve strange cases and restore justice and peace to the world.