The dead are rising. Nathan Treeves leads an army of ghosts from the underwater city of Waterblack, heading to the final, destructive confrontation with the forces ranged against him. But although he is more powerful than ever, he also has new challenges to face. Most notably, Sharli, an assassin whose journey we follow – from her perilous childhood in Malarkoi, to slavery in Mordew, working in a nail factory, to making murder her trade under the ever watchful eye of the terrifying Mr Padge, and on to the final climactic encounter between Nathan, The Master, The Mistress and the Atheistic Crusade… In this conclusion to the Cities of the Weft trilogy, Waterblack poses questions about the way power can be abused, who decides who has power – and what it means to have none.