Like every woman, Celeste Morton holds a map of the future in her skin, every mole and freckle a clue to unlocking what will come to pass. With puberty comes the changeling period – when her final marks will appear and her future is decided. The possibilities are tantalising enough for Celeste’s excitement to outweigh her fear. Changelings are sought after commodities and abduction is rife as men seek to possess these futures for themselves. Celeste’s marks have always been closely entwined with her brother, Miles. Her skin holds a future only he, as a gifted interpreter, can read and he has always considered his sister his practice ground. But when Celeste’s marks change she learns a devastating secret about her brother’s future that she must keep to herself – and Miles is keeping a secret of his own.