At the end of a certain dynasty, Japanese riots were everywhere, eunuchs were in power, and Cao Gonggong of the East Factory colluded with Japanese pirates, harmed the Central Plains martial arts, and intended to rebel. Changhai's external identity is the head of the Quedao Sect, but in fact he is a member of a secret anti-Japanese organization. In addition to destroying the Japanese pirates, another important task is to find out the traitors in the court who colluded with the Japanese pirates. At the same time, Cao Gonggong also discovered that there were martial artists who opposed him, and secretly sent people to monitor the every move of the martial arts sects. In order to conceal his tracks and carry out secret missions at the same time, Ximen Changhai (played by Zhao Benshan) found his twin brother Ximen Changzai (played by Zhao Benshan) far away in his hometown and asked him to pretend to be himself. Although they are twin brothers, Ximen Changhai and Ximen Changzai have completely different personalities and life paths. The younger brother is a heroic and brave generation of heroes, while the older brother is a timid and cowardly market cook. Faced with his brother's request, the timid Ximen Zhang refused to agree, but he could not resist the coercion and temptation of his brother Changhai, but could not resist the temptation of his brother's promise to find him a "partner", so he half-heartedly agreed to impersonate. In this way, Ximen Zhangzai confusedly changed from a chef to the head of the sect, and entered the bizarre world of martial arts. Ximen Zhangzai came to the unfamiliar Quedao Sect and wanted to impersonate his brother. The first hurdle he encountered was to deceive several relatives around his brother Changhai: the stupid and dull apprentice Hao Meng (played by Cheng Ye) and the fiery Ye Si Niang (played by Ge Shanshan), the reckless and impulsive second apprentice Zhao Dezhu (played by Song Xiaofeng), and of course the most difficult one was his brother's daughter Ximen Rou (played by Li Xiaohe). Ximen Changzai originally wanted to keep a low profile and get away with it, but unexpectedly, the tree wanted to be quiet but the wind did not stop. Various troubles followed one after another. Tianchi Gang leader Gao Damao (played by Song Xiaobao), the leader of the Five Poisons Sect and others came to him one after another. The most dangerous thing was that Ximen Changzai attracted the attention and suspicion of Eunuch Cao (played by Yang Shulin) of the East Factory!