Rebus investigates when a number of women are killed with the same modus operandi as 'The Preacher', a prolific serial killer active in Edinburgh during the 1980s. But is a copycat killer at large, or has 'The Preacher' returned to finish what he started?

Rebus investigates when an old friend, DI Jack Morton, is shot during an undercover operation at a pharmaceuticals factory which has become a hub for cocaine dealing and gun-running by a well-known mobster and his latest team of upstart thugs.

Rebus is forced to juggle two complex cases when an old friend approaches him to trace her son, who has disappeared, and a former colleague is killed in a freak accident, which asks the question - did he kill himself or was he murdered?

The motto of the Scottish kings - Nemo mi impune lacessit ("Don't Mess With Me") sets the tone for this story. It's payback time for DI John Rebus in his pact with the crime underlord Morris Gerald Cafferty for his finding the person who put Rebus' daughter in a life-threatening coma, the result of a hit-and-run accident. This time, it's Cafferty's illegitimate son who was "six-packed" and killed, and Cafferty is calling in his chips from Rebus.