It is March 1870. London is in the grip of fog and ice. But Scotland Yard's Inspector Ben Ross has more than the weather to worry about when the body of a young woman is found in a dustbin at the back of a Piccadilly restaurant. Ben must establish who the victim is before he can find out how and why she came to be there. His enquiries lead him first to a bootmaker in Salisbury and then to a landowner in Yorkshire. Meanwhile, Ben's wife, Lizzie, aided by their eagle-eyed maid, Bessie, is investigating the mystery of a girl who is apparently being kept a prisoner in her own home. As Ben pursues an inreasingly complex case, Lizzie reveals a vital piece of evidence that brings him one step closer to solving the crime.