Molly wakes her mother to go to the toilet. The campsite is strangely blank. The toilet block has gone. Everything else has gone too. This is a place with no sun. No god. Just four families remain. Each has done something to bring them here - each denies they deserve it. Until they see what's coming over the horizon, moving irrevocably towards them. Their worst mistake. Their darkest fear. And for just one of them, their homecoming.