Party Line

Brother and sister Seth and Stacy live a secluded life in their family's beautiful Beverly Hills mansion. But these upper class siblings share a dark and violent hobby of using sexually driven 'party lines' to meet and lure lustful strangers into a deadly ménage à trois, the climax of which is a razor slash to the throat! With the victim count steadily rising, Detective Dan is under the gun to crack the case, but when his girlfriend falls prey to the maniacal duo, Dan goes rogue, taking his own violent measures to dispense justice. (Vinegar Syndrome)