The moon is bright in the sky, and the scenery is poetic and picturesque. Behind the beautiful scenery is the danger of the martial arts world. The old leader of the martial arts world (voiced by Pu Cunxin) was plotted against by the scum Xiong Tianba (voiced by Zhang Fengyi), and was poisoned and in danger of death. In the critical moment, the old leader was rescued by Tu Er (voiced by Fan Wei), a hawker selling fried cakes. Knowing that he would not live long, the old leader passed on his lifelong skills to Tu Er, and asked him to go to the Tiger Roaring Martial Arts Hall in Beijing and hand over the token representing the supreme master of the martial arts world to his daughter Mudan (voiced by Yan Ni). Tu Er kept his promise and endured the hardships all the way to the Tiger Roaring Martial Arts Hall. At this time, Xiong Tianba had already established himself as the leader of the martial arts world and occupied the martial arts hall, while Tu Er became a chore in the kitchen of the martial arts hall. On the other hand, Mudan, who was unaware of the situation, also returned to the capital with the old leader's apprentice Liangmi (voiced by Zhang Yishan). What awaits them will be a battle between good and evil that will shake the martial arts world...