The story follows the lives of three young girls sold into China' most notorious brothel, "The Fragrance House", where sister Kau teaches Susan, Chinyum, and Fanny the Asian way of pleaqsuring men with her legendary sucking skills until she sells their virginity to the highest bidder.

When the competition is held for their deflowering, amongst the highest bidders is Sir Lui, a wealthy trader, and Chu, a young and inexperienced scholar, who strike up a friendship. That evening Susan is the prize--and Lui bids for her as a gift for Chu and takes Fanny for himself. The next day Lui takes Fanny as his concubine even though he really loves Susan.

When Chu is forced to leave "Fragrance House", Susan refuses to have sex with the customers and is cruelly tortured until the sexually perverted Lui arrives and forces her to become another one of his concubines.

When Fanny murders him and frames Susan, the plot thickens. Only her Chinyum and her lover Chu can save her from a fate worse than death.

Mind-blowing sex, hugely endowed eunuchs, and thirteen tricks from the book of virgins are just some of the gems that make "Sex And Zen 3" an unmissable treat.