Mélanie is devastated when she learns that it is most likely Nathan, her husband's friend and teammate, who will assassinate him in a few hours... She has one last request: to meet her daughter whom she has not seen to grow. In 2025, Parvana has followed through on her threats and left home with Sam. To make matters worse, Ludo finds himself removed from the investigation. Will Ludovic and Mélanie manage to prevent the inevitable?