The doctor managed to transplant a horse's penis to replace the scholar's meager one. Armed with his new 20-inch penis, the scholar goes on a sexual rampage, not caring if he is seducing other men's wives or is nearly caught in the process. Meanwhile, Huk-Yeung, after experiencing the joys of sex, becomes sexually frustrated. She tries masturbating with paintbrushes but is left unsatisfied until she has an affair with Wong Chut (Elvis Tsui), the husband of one of the wives the scholar seduced, who is now working as Yeung-Sheng's gardener. She becomes pregnant and runs away with him, who out of revenge sells her to a brothel. Mistress Ku, the madam (Carrie Ng), assaults her leading to a miscarriage, originally unwilling she is coerced into becoming a prostitute and comes to enjoy her new life.