A Darker Fifty Shades: The Fetish Set (2015)

Plot

Four stunning women arrive at a fetish convention with dreams of quick cash, only to plunge into a sinister underworld filled with obsession and murder. A deformed, sadistic killer, played by Bill Oberst Jr., targets the group, forcing them to confront their own boundaries and test the strength of their friendship. As the weekend spirals into chaos, they must navigate a series of harrowing challenges to escape the clutches of a relentless predator, leading to an unforgettable battle for survival that will transform their lives forever.