“The plot beautifully and painfully slowly unfolds” THEY SAY: Mid-December, and Cambridgeshire is blanketed with snow. Detective Sergeant Manon Bradshaw tries to sleep after yet another soul-destroying Internet date – the low murmuring of her police radio her only solace. Over the airwaves come reports of a missing woman – door ajar, keys and phone left behind, a spatter of blood on the kitchen floor. Manon knows the first 72 hours are critical: you find her, or you look for