Cambridge is sweltering, during an unusually hot summer. To Jackson Brodie, former police inspector turned private investigator, the world consists of one accounting sheet--"lost" on the left, "found" on the right--and the two never seem to balance. Jackson has never felt at home in Cambridge and has a failed marriage to prove it.

What if you had the chance to live your life again and again, until you finally got it right? During a snowstorm in England in 1910, a baby is born and dies before she can take her first breath. During a snowstorm in England in 1910, the same baby is born and lives to tell the tale. What if there were second chances? And third chances? In fact an infinite number of chances to live your life? Would you eventually be able to save the world from its own inevitable destiny? And would you even want to?

In 1940, 18-year old Juliet Armstrong is reluctantly recruited into the world of espionage. Sent to an obscure department of MI5 tasked with monitoring the comings and goings of British Fascist sympathisers, she discovers the work to be by turns both tedious and terrifying. But after the war has ended, she presumes the events of those years have been relegated to the past for ever. Ten years later, now a producer at the BBC, Juliet is unexpectedly confronted by figures from her past. A different war is being fought now, on a different battleground, but Juliet finds herself once more under threat.

Toby is a happy-go-lucky charmer who's dodged a scrape at work and is celebrating with friends when the night takes a turn that will change his life - he surprises two burglars who beat him and leave him for dead. Struggling to recover from his injuries, beginning to understand that he might never be the same man again, he takes refuge at his family's ancestral home to care for his dying uncle Hugo. Then a skull is found in the trunk of an elm tree in the garden - and as detectives close in, Toby is forced to face the possibility that his past may not be what he has always believed.

Into Keldale's pastoral web of old houses and older secrets comes Scotland Yard Inspector Thomas Lynley, the eighth earl of Asherton. Along with the redoubtable Detective Sergeant Barbara Havers, Lynley has been sent to solve a savage murder that has stunned the peaceful countryside. For fat, unlovely Roberta Teys has been found in her best dress, an ax in her lap, seated in the old stone barn beside her father's headless corpse. Her first and last words were "I did it. And I'm not sorry".