A fifteen-year-old girl is on a field trip with her class--and the bus goes over a cliff, killing them all. Three years later she appears near the dam and walks back to town. Her mother, to say the least, is surprised to see her. What makes it even stranger is that she has an identical twin sister who is now three years older than her. Other people begin to return to the mountain town as well. None of them have aged and they don't have any recollection of dying. This French series, along with the UK's IN THE FLESH, is one of the more intriguing zombie television series to date.