When Lucy Atwell’s baby is snatched from a pram in Norwich city centre, there appear to be no clues as to its whereabouts. The CCTV proves nothing and there are no witnesses to the crime. Suspicion soon falls on the loner living opposite, a convicted paedophile. But what of the dog in the night-time? And intractable puzzle for DCI Ketch, the melancholic Norwich detective.