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Beautiful and brilliant, Josie and Jack Raeburn are closer than they should be, and run riot in their father's isolated house. But as his behaviour becomes more unpredictable, they are forced to leave, and face a world for which they are utterly unprepared. Jack's love for Josie has always been her safety-net. However, as his world grows wilder and more dangerous, she finds herself struggling: should she escape his control, or help him? It is only when they are united again, in the company of Jack's astoundingly rich girlfriend Lily, that she understands what she must do.