Mercy - Die dunkle Seite der Lust

Although it is not the most intellectually stimulating movie you will ever see, Mercy is well worth the rental price.

Ellen Barkin plays Katherine Palmer, a homicide detective tracking down a sadistic serial killer who chooses female victims from very wealthy and socially prominent circles.

Palmer finds a connection between the victims in Vicki Kitrrie (Peta Wilson) a mysterious and very seductive blonde who had a sexual connection with many of the victims. It seems that all the women belonged to a group that covertly engaged in lesbian sex and S&M. Palmer suspects someone in the group is the killer and must submerge herself in the women's sexual under world with Kittrie's help.

Yes, the plot is a straight to video exploitation standard. But the production values and the good perfomances by the leads make this a good watch.