Claire Lepecq-Quémeneur investigates the murder of a drop out, found on a piece of wasteland. Very quickly Alain, her ex-husband, realises that their 17 year-old son Basile, is guilty and does everything possible to avoid Claire suspecting him. But the clues she discovers lead her to the same conclusion.
A policeman whose daughter has been murdered clashes with his mother over the identity of the killer. This violent disagreement, which reopens old wounds, will be the key to solving a murder much more complex than it appears. What if this tragedy paved the way for a potential reconciliation between a mother and a son that everything sets against each other?
