Six months after the flooding of the valley much of the town's population have been evacuated, though some remain hoping to find loved ones taken by The Horde. An expert, Richard Berg, arrives tasked with finding the cause of the flood.

Cast: Anne Consigny, Clotilde Hesme, Céline Sallette, Frédéric Pierrot, Laurent Lucas, Grégory Gadebois, Guillaume Gouix, Pierre Perrier, Ana Girardot, Yara Pilartz, Jenna Thiam, Swann Nambotin, Jean-François Sivadier, Michaël Abiteboul, Constance Dollé