For Richard and Sarah, leaving the rat-race of London for the sleepy village of Worth feels like a dream come true. But their new life isn't quite as idyllic as it at first seems. The cottage is tiny, the neighbours are racist and they find themselves reverse-commuting back to London on the weekends. And then Catherine moves next door and it's love at first sight. Smart, sophisticated Catherine, with her good wine, her foreign travel and -- well -- her London ways. But there are things about Catherine that don't quite add up. Topics avoided, questions unanswered and before long Richard and Sarah realise that rather than being the answer to their prayers, Catherine might in fact be quite the opposite.