Roxane is in critical condition after the mysterious attack she suffered. For Morgane, without a doubt, she has to do with the death of Romain, a file in which the IGPN agent worked before the tragedy. During the investigation, Morgane must face her past and solve the main mystery for which she entered the DIPJ. Also, she reminisces about what she really went through with the love of her life almost 20 years ago.