S1, E1: In a small mountain community, two local people - teenager Camille, and Simon - who both died years earlier, suddenly re-appear at their homes. These ghostly characters appear in human form, 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. Camille's twin sister Lena is now three years older than her, and Simon's wife Adele is just about to get remarried, to Thomas, while Julie, a lonesome nurse, receives a visit from a very strange little boy. Seven years ago, the town was struck by a series of bloody murders, and now it seems they have started up again.