Compulsion, also known as Sadie, is a 2016 internationally co-produced erotic thriller film directed by Craig Goodwill.
At an event in Italy, Alex shows up and invites Sadie to spend the weekend with him instead of meeting Thierry's family in Paris.
At the villa, Sadie and Francesca drink and take drugs and begin a sexual relationship while Alex prepares for a party.
Alex escorts Sadie to a room full of people surrounding Thierry, who is tied up in the same way the woman was the previous night.
Sadie approaches Thierry and cuts her own arm behind his back while the rest of the crowd begins to kiss and fondle each other.
As Sadie moves to cut Thierry's bonds, Alex attempts to stop her but she stabs him in the stomach.