Darius, lively, passionate, a bit of a schemer, is the boss of the "Invisibles", a marginal brigade that manages investigations into bodies without identity, without history, without past... His obsession? Give them back their dignity, their humanity so that the families can grieve. His team ? Marijo, cheeky with a big heart, always moaning; Ben, former boxing champion, big teddy bear with sensitive fists; Duchess, a 25-year-old petite bourgeoise, brilliant but unaccustomed to the terrain, and Angie who reconstructs bodies with a mischievous pep. Their mission? Identify the bodies before they end up in the mass grave to stop the murderers before they get away with it. A charred body, a bride swept away, body parts across town...