Amorestremo (2001)

The librarian of the university Xenia schedules a S&M blind date with the masochist Ghost to satisfy her fantasies and sexual desires. They spend the night in his apartment having kinky sex and on the next morning Ghost is dead with slashed throat. Xenia cleans her evidences and leaves the place, but Ghost's friend Silver investigates the murder of Ghost and finds her files in a CD. Later he discloses that sergeant Ghost was investigating the site SexServices. Silver contacts Xenia and they meet each other, when he finally discloses who the killer is.