After committing a series of multiple murders, a neurologist visits an incarcerated killer, living in exile. She studies him and his brain and discovers the horror that lurks behind his violent impulses.
Filled with expectations, Etienne moves to Paris from Lyon to study film directing at the Sorbonne. He leaves behind his girlfriend Lucie, promising to call her regularly via Skype. On his course he meets Jean-Noël and Mathias, they too …