A phone is found with videos showing a group of young people terrified by a macabre discovery in the forest. After the body of one of the young people is found, Laurène and her team investigate, endeavouring to understand what went wrong on their nocturnal spree. At the same time, she tries to assess her complicated relationship with Bertrand, the town's Mayor.

A woman suicides on the same day that her husband is awarded a medal of honour. Laurène suspects that this man isn't quite the hero that everyone thinks they know. She tries to discover what dark secrets he's hiding, but he's protected by the Mayor, an old childhood friend.