Warning : the print I saw was entitled "Sex For Sale", but it is not the 1993 movie of that name.
The story mainly concerns the escapades of two girls from Kuala Lumpur working as short-time cheap-motel pros in HK. Mandy and KiKi are friends who only serviced two or three men a night at home, but are expected to do 20 or 30 in HK. KiKi quips that HK men come quicker. Their new boss, the animalistic Kan, allocates his faithful man Kit to guard/escort Mandy, and the idiotic gambling addict Shing to guard KiKi.
The girls are ferried in and out of many shabby hotel rooms and get busted a couple of times. During one bust, they get a taste of how corrupt CID detective Big Eye Tai gets results - by beating the crap out of suspects. A quote to ponder : "I will give you a good lesson no sooner". Big Eye is also good friends with Kan, and his boss, the Madam Inspector, turns a blind eye, until one of the girls sets him up. There is treachery and gang rivalry, but love seems possible as well, as Mandy and Kit find it increasingly harder to hide their feelings for each other.