Jianghu rumors say that Yan Wuying, the head of the "Yingshalou" who stirred up the martial arts world twenty years ago, washed his hands of the underworld and retired into the deep mountains. Twenty years later, Lin Xiaoyuan, the disciple he picked up, and Su Xiaoqing, the adopted foster daughter, turned out to be a hilarious pair who can't do anything right but never get enough to eat. Lin Xiaoyuan is determined to become a great hero, but his master only taught him a set of "Turtle Flipping Over Fist"; Su Xiaoqing dreams of marrying into a wealthy family, but her master forced her to learn the "Eighteen Pig-Slaughtering Blades". One day, a blood letter is delivered to the mountain gate—the old enemy, the "Zhengyimenu", comes knocking, demanding that Yan Wuying hand over the "Number One Martial Arts Secret Manual", or else wash Yinjiàn Peak in blood.