Written by Wong Jing, with Cheng Xiaodong as martial arts director and Chu Yen-ping as director, this Hong Kong comedy classic is hilarious. The twins, coupled with stunt-style martial arts, make this movie. The plot is quite familiar, but the leading actors are a brand new pairing. Big Flying Knife Han Chong (Tony Leung) and Little Flying Knife Han Lin (Jimmy Lin), and Big Flying Knife Er Niang (Sharla Cheung) and Little Flying Knife Feng Ling (Yip Wing-yee), love each other, but are vindictive towards each other. Big and Small Flying Knife make a living by catching thieves and collecting rewards, but they are often cheated of their spoils by Big and Small Flying Knife. Rich businessman Cao Yuanwai (Chen Honglie) offers a high price to capture the world's number one thief Nine-tailed Fox (Jacky Cheung), and designs four deadly thieves to trip up Big and Small Flying Knife so that he can get there first. Nine-tailed Fox's wife Fei Tianmao (Maggie Cheung) is a powerful character with great martial arts skills. Unfortunately, Big and Small Flying Knife was captured during a sneak attack. Fortunately, Big and Small Flying Knife rescued her, so the four of them joined forces to capture Nine-tailed Fox, but the cunning Nine-tailed Fox finally escaped. Flying Cat even tried to seduce Han Chong with sex, but he ran into Feng Erniang, a jealous woman, and a fierce fight ensued. Han Lin was captured by a man who led a large number of Japanese ninjas. Feng Ling hurriedly reported the incident, and then everyone knew that Cao was actually the head of the East Factory, Cao Tiandi. He was hunting down the Nine-tailed Fox at all costs because the Nine-tailed Fox stole evidence of his collusion and betrayal. In the end, with the help of the Drunkard (Ng Man-tat), everyone finally defeated Cao Tiandi, and the lovers finally got married.