London, 1851. On his deathbed, the sinister Sir Gerald Hawke asks a distant cousin, Reverend Meredith Case, to find Sapphire, his long-lost ward and heir to the Hawke family jewels.
Concerned for her welfare, Meredith vows to discover where Sapphire disappeared to.
Meanwhile, Felix Gresham, a young man with literary ambitions, is found murdered on the steps of a bookshop. As an acquaintance of the Gresham family, novelist Charles Dickens once again teams up with Superintendent Sam Jones to investigate the murder.
But in his quest for the truth, Dickens finds that those associated with Felix are reluctant to talk. And when he is called on to assist with the search for the Hawke heir, he begins to wonder whether the two cases could be connected…
What became of Sapphire Hawke? What secrets did Felix take to his grave?
And can Dickens find the link between the two mysteries?