The mayor of a town is framed for the suspicious death of a military guard. When more deaths of military guards occur, rumors of killing vampires spread fear into the town, pushing a young Taoist priest and autipist to investigate.

Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.

One month earlier, Shang Zhen (Lynn Hung) arrives in Seoul, South Korea, where she coincidentally meets Jian Yu (William Li), who had his marriage proposal rejected. Shang Zhen, who is still heartbroken, had a sudden idea: to use Jian Yu to sabotage her ex-boyfriend's wedding. Thus, Jian Yu follows Shang Zhen back to China, where she reveals her "wild" side. Shang Zhen's cousin, Yong Zhen (Feng Yuanzhen), is also much of a headache for men. Working as a Taekwondo coach, Yong Zhen has a student named Zhi Kai (He Jiong) who lacks masculinity. Zhi Kai admires Yong Zhen greatly but often suffers under her fists and feet. Jian Yu accompanies Shang Zhen in preparing for the wedding sabotage, but during a rehearsal, they offended a stranger. Meanwhile, the wedding date is fast approaching. The film is an unofficial sequel of the 2001 South Korean film "My Sassy Girl".