Summary The last night Rayann told Nadine that the former employer of Karine, Laetitia Gorman ,who has been released from prison is the main suspect of the murder of Karine,some witnesses have seen her near the the canal Saint Martin.Bernard and Nadine are charge of a woman ,about 40 years years old, with some in hits on the face and having convulsions on the sidewalk.Later they learn that the woman called Valérie Musset, who lives alone,gave birth in an hospital.When they interrogate her that affirms that she gave her baby to a female friend and that the baby died. Rayann has been called by the internal affairs and they confirmed that Laetitia Gorman has been arrested and that Karine was pregnant.Maxime and Chloé go to the banks of the Saint Martin canal where the corpse of a warden has been found: his name is Bruno Planche, he was married and had 3 children.Near the corpse a painting tin and on the wall a unfinished tag "Klong".Maxime and Chloé find easily the tagger: Christophe Beaunois alias Klong, he lives with his mother, he went to the banks of the canal when a group of adolescents attacked him, the warden was trying to protect him and so Klong could escape; the adolescents were speaking of a bunker.

• Crime
• Thriller