"Invincible Tieqiao San" is based on the character Tieqiao San (Liang Kun), who is famous in South Guangdong and is known as the master of Hong Quan. It focuses on showing the legendary life experience of a generation of masters. It is reported that Dai Xiaolan, played by Xu Yaoxuan, is a hidden kung fu master. On the surface, Dai Xiaolan is just a close maid of Jiang Lin'er, the eldest daughter of a pottery family, but in fact she has a lot of skills. The people Dai Xiaolan cares most about in her life are Miss Jiang Lin'er and Tieqiao San. Xiaolan and Lin'er grew up together. They are master and servant in name, but they are like sisters in reality. Xiaolan is loyal to Lin'er. When the Jiang family encountered changes, Xiaolan has always been by Lin'er's side to help Lin'er solve problems.