The French detective series "Les Invisibles" tells the story of a special police investigation group that deals with identifying nameless murder victims. As soon as another "John Doe" is brought to the morgue, Darius and his subordinates take on the case - experienced detective Mari-Jo, former professional boxer Ben, and a wealthy Duchess who investigates for her own pleasure. The task for the team is to uncover the story behind each crime and find the loved ones of the victims.