In a prestigious business school, IEMS, a student is the victim of an attempted rape. Her fiancé comes to her aid and stabs her. The investigators gather the clues which seem to point to a prowler coming from a neighbouring city. Elodie doesn't believe this version and is convinced that the murder was committed by some school students. Her suspicions relate to a group of four students. What she doesn't know is that young people come from large families and have very influential parents. Elodie will learn the hard way that it is not easy to attack people who already consider themselves the elite of the nation and so untouchable...