She turns her head and smiles. Something is wrong with her face. The bones have been recarved. Her lips are thin and her nose is a dark blade. Teeth small and yellow. The lashes of her hazel eyes have thickened and her brows are drawn together, an expression he has never seen, a look that is almost craven. 'Mrs Fox' is the story of a husband who is shocked out of his complacency when his wife undergoes a remarkable transformation.