Ming Dynasty secret agent Ling Ling Ling (000) is assigned to investigate a drug poisoning involving a performance enhancing drug in the brothel, Ying Chun Kwok. Ling thought hard and finally came up a disguise as the author of Yuk Po Tuen (Sex and Zen) to sneak into the brothel. The prostitutes in order to get their names into the book all tempted Ling, who in order to appaise the ladies, turned the book into a book of dirty stories. One day, a blind servant Yuk Chu Nui (Jade Virgin) is auditioned, Ling learned that the buyer would receive the drug, so he bidded up the prices hoping to receive the evidence. Who would expect that someone else is bidding with a higher price?

An evil Duke attempts to kill and collect the blood of a royal family of European vampires in order to become all powerful. The only surviving member of the family travels to Hong Kong, only to complicate his struggle by falling in love with a mortal girl who just happens to have a vampire hunter for a brother.

Stephen Chow plays a selfish yet in some places kind hearted barrister who tricks his servant in doing things for his own benefit. Eric Kot playing the servant is misguided by what he thinks is love and leaves Chow vowing that he will never need Chow’s help again in life. Shortly afterwards Kot gets into some big trouble (due to be executed) with the British and calls on Chow for help. Chow tries to help his client, but is fish out of water when he has to fight this court room case according to western rules.