The domestic bliss of Detective Inspector Rowan Jackman, of Fenland Constabulary, doesn't last long. His old nemesis, serial killer Alistair Ashcroft, is back in town and ready to tidy up unfinished business. Ashcroft sends a sinister text to DS Marie Evans. His opening move in what will prove to be a lethal game of cat-and-mouse. Yet for all his taunts, where is he? In a county crawling with police on the lookout for him, Ashcroft is nowhere to be found. Everyone Jackman cares about is in danger. Alongside the hunt for Ashcroft, however, normal police work must continue. The separate thefts of six pigs, a thoroughbred stallion, guns and some oil lead Jackman's crew to the notorious Lorimer family, ruled over on their farm by the fearsome matriarch Rachel. Meanwhile, a seemingly routine break-in at the home of gun-club owner Kenneth Harcourt quickly becomes more complicated when the man long held responsible for having killed Harcourt's young daughter in a hit-and-run is shot dead in a car park by a sniper. A killer is on the loose in the quiet streets of Saltern-le-Fen, and he isn't going to stop at claiming one life. But why is he focusing on young Kevin, so close to promotion to detective? And the sniper, like Ashcroft, takes to taunting the police: they'll never catch him, they need to respect him, they shouldn't be sidetracked looking for their old adversary.