Paddy Considine returns as the Jonathan 'Jack' Whicher, the pioneering 19th-century detective, now working as a private inquiry agent, having left Scotland Yard under a dark cloud. In the third instalment of the series, Whicher is hired by his former political master, a distinguished and powerful grandee, Sir Edward Shore, to investigate threats that have been made against his son Charles. Whicher's unswerving pursuit of justice takes him into the most dangerous corners of London's Docklands. But it also brings him into contact with a woman who starts to melt his long frozen heart.