At the end of some dynasty, wokou pirates run amuck and the eunuchs had the imperial power in their hands. Eunuch Cao of the Eastern Bureau colludes with the pirates to slaughter the people of the martial arts world and plot a rebellion. The leader of the Magpie Saber Sect Chang Hai is actually a member of a secret anti-pirate organization. Apart from wiping out the pirates, his other important task is to discover the officials who collude with the pirates. Meanwhile, Eunuch Cao is secretly monitoring all sects for those who oppose him. To conceal his identity, Xi Men Chang Hai finds his twin brother, Xi Men Chang Zai, who is living in their hometown, and asks the latter to take his place. Although twins, they are utterly distinctive in character and life choice. Chang Hai is a hero while Chang Zai is a timid cook. Initially Chang Zai doesn't agree but is persuaded by Chang Hai's promise to get him a wife, THus the brothers change places and Chang Zai becomes a leader of a sect and breaks into the thrilling martial arts world. Chang Zai's first hurdle is to face is his brother's family, aka, Hao Meng, the eldest disciple who is dull and staid, Ms. Ye, who is extremely passionate, Zhao De Zhu, the second disciple, who is reckless and impulsive, and Xi Men Rou, the daughter of Xi Men Chang Hai and the most difficult one. Chang Zai lies low and tries to muddle through. However, trouble keeps knocking at the door. Gao Da Mao, the leader of the Celestial Pool Gang, the sovereign of the Five Poison Sect and others all come to him. Most dangerously, Chang Zai arouses the attention and suspicion of Eunuch Cao!