When delivering fast food one day, A Yin (Zhou Xingchi), a worker at a fast food restaurant, met Ali (Zhong Liti), who was studying Japanese karate in a martial arts training hall, and fell in love at first sight. After being humiliated by Lin Guobin, a martial arts coach who also liked Artie, A Yin, who felt too weak, decided to worship Uncle Da (Wu Mengda), who called himself a "devil muscle man." at first, Da Shu only wanted to defraud A Yin of money. finally moved by his kindness and persistence, he began to teach him ancient Chinese boxing. When A Li was intercepted by a bad guy, A Yin came to the rescue with a Garfield cat mask on her head and rolled down from the high platform with the gangster in her arms, but created an "invincible wheel of wind and fire," only to be taken credit for by Lin Guobin afterwards. In order to prove his strength, A Yin signed up for a duel with Lin Guobin, hoping to win Alifang's heart again.