One to Another (Chacun sa nuit) Trailer (2006)

Lucie and Pierre, 20-year-old brother and sister, share an intimate relationship with each other and their group of friends. Pierre is a magnet for the band of youths, but he himself is unstable and narcissistic. One day Pierre is found savagely murdered. As the police investigation drags on, Lucie, aided by her friends, decides to find out who killed her brother. As we get deeper into the story, we learn of complexly cross-hatched dependencies and humiliations, where bodies are casually traded and ransomed. The surprise ending prompts as many questions as it answers about how sexuality can both inspire and defeat us.