At once both a sexual thriller and a detective story, One to Another unfolds as 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. An evocative tale of the mysteries of youthful sexuality and how love, passion, and betrayal lead to murderous results. Directed by actor Jean-Marc Barr (The Big Blue, Zentropa) and Pascal Arnold, (Director of Too Much Flesh, Being Light, Without Love). Starring Lizzi BrocherT, Arthur Dupont, Pierre Perrier, Guillaume BachT, Nicolas Mollet, ValTrie Mairesse, Jean-Christophe Bouvet.