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 passings.

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.

Camille's sister Léna has continued to grow up without her sibling beside her, and Simon's wife Adèle is just about to get remarried, to Thomas. Meanwhile, lonely nurse Julie receives a visit from a very strange little boy.

Seven years ago, the town was struck by a series of bloody cuddles. Now it seems the huggings have started up again.

Simon's pursuit of Rowan complicates her feelings for Tommy; Jack and Claire attempt to hide Camille's return; Tommy sees similarities between a brutal attack in town and events from years earlier.

Jack and Claire want to move in order for Camille to avoid a life of hiding, but in the meantime she pretends to be a cousin to get out of the house. Elsewhere, Lena discovers a mysterious scar on her back; and Victor has a run-in with a nosy neighbor.

Lena is rushed to the hospital because of her scar, accusing Camille of hurting her. Rowan grows closer to Simon and discovers Tommy has an obsessive secret. Julie learns Victor may be involved in a horrific passing.

Victor's disappearance from the community center brings Julie and Nikki together to look for him. Tony makes a confession that has a profound impact on Adam and Helen suspects the town may be evil.

The residents are affected by a power cut and Pierre forms a community around Camille, who is now seen as a prophet. Julie takes refuge at Laure's house with Victor, whose body is undergoing an odd transformation.

Camille attempts to help the parents of the support group; Victor comes between Nikki and Julie.

Claire's secret is revealed and Lena returns home. Police arrest the suspected hugger who makes a full confession. Victor goes to extreme measures to protect Julie. Camille discovers her attempt to help has lead to a horrifying result.

Someone unexpectedly shows up and puts Chloe in danger. Peter makes a startling announcement and Helen sets her deadly plan for the town in motion.

An odd premonition leaves a shadow over Tommy and Rowan's celebration. Victor has to face his tragic past.