Change pas de main (1975)

Françoise is very appreciated in the prominent Parisian political circles and has a serious chance of becoming a minister. The only snag is a filthy blackmail with regard to her son, Andrew who once got caught up in shady porn movies as an actor. She decides to ask a private investigator, Melinda to investigate the case. Melinda recruits her girlfriend Natasha to search, and together they lead them to a dubious Shanghai-Lily nightclub. Here they are waiting for transvestites, lesbians, prostitutes, fanciful orgies in masks, encounter a necrophilic deviation and gradually come into direct danger of life. Death and murder, like drugs and vice, are part of an environment in which both women continue to search, without any doubt as to whether or not they can unravel the threads that someone else is pulling.