In a small mountain community, two local people - Camille, a teenager, and Simon - who both died years earlier, suddenly re-appear at their homes. They have not aged, and they are completely unaware of their own deaths. Camille and Simon assume they can rejoin the world of the living as though nothing has happened, but their return throws their friends and family into a state of turmoil

Simon approaches Adèle, but Thomas finds out about his 'return'. In the meantime, Camille is unable to fit back into her family again. Her mother Claire and father Jérome separated after her death, and now Claire is in a relationship with Pierre, an odd but charismatic figure who knew all along that the dead would return

Determined to come out of hiding and return to something resembling normal life, Camille invents a new identity for herself as 'cousin Alice'. Her sister Léna finds a strange, fast-spreading scar on her own body. Simon gets closer to Adèle, who finally accepts he has returned and is not a manifestation of her grief

Camille's new identity as Alice is going well, but Léna's scar is growing and seemingly draining her of energy. Léna is convinced that Camille is behind it and publicly denounces her to their friends. Julie can no longer keep Victor under wraps and the police take him away

The ghosts leave clandestinity little by little but do not arrive therefore taking again a normal life. While Camille is rejected by Frederic, Simon is violently isolated of Adele and Chloé, whereas Thomas, in a state of self-defence, does not hesitate to draw over him. On his side, Victor wanders in search of his assassin

The town is affected by a power cut. Pierre forms a community around Camille, who is now regarded as a kind of 'prophet'. Julie finds refuge at Laure's house with Victor, whose body is undergoing a strange transformation

Camille finds purpose when she decides to invent images of an afterlife to comfort her friend's parents, but is distraught when they commit suicide in the hopes of meeting their son sooner. Pierre shows Claire his shelter stocked with food and firearms, believing that the appearance of the Revenants marks the end of days. Lucy appears to have gained understanding regarding the purpose of the Revenants, and persuades Simon that he no longer needs Adèle; father Jean-François' betrayal of him to the police only pushes him further to her

A flashback to the date of Camille's reappearance at the dam shows many Revenants also appearing at the same time. Waking in their car, Victor tells Julie and Laure that a group of Revenants tried to take him from the car in the middle of the night. On their way to the shelter, Victor discovers that Toni killed his brother, in turn causing his mother's death, and uses his ability to create visions to make Toni shoot himself in the stomach; he dies shortly after arrival