Ho Kam An aka Ah An (Stephen Chow) is a delivery boy with a heart of gold, but a total wimp. During one of his delivery runs, he meets up with Lily (Christy Chung), who uses him to fend off the advances of the judo instructor Blackbear. But when Blackbear calls out Ah An, An cowardly runs away, something that Lily cannot tolerate. Ah An meets up with Tat (Ng Man-Tat), better known as Devil's Killer, a cripple who we later find out is a kung-fu master. Tat offers to teach Ah An kung fu, and a Garfield-masked An challenges Blackbear to a fight, which An wins. However, Lily's long-lost classmate and Japanese karate master Tuen Shui Lau (former Anita Mui beau Lam Kwok-Bun) claims to be the masked Garfield. Ah An then challenges Master Tuen to a death duel.

Stephen applies the formula that has made him so successful in other movies, a lovable underdog character combined with lots of left-field humor. This Lunar Year movie was a big hit in 1994.