Two years after the events of Case Histories left him a retired millionaire, Jackson Brodie has followed Julia, his occasional girlfriend and former client, to Edinburgh for its famous summer arts festival. But when he witnesses a man being brutally attacked in a traffic jam - the apparent victim of an extreme case of road rage - a chain of events is set in motion that will pull the wife of an unscrupulous real estate tycoon, a timid but successful crime novelist, and a hardheaded female police detective into Jackson's orbit. Suddenly out of retirement, Jackson is once again in the midst of several mysteries that intersect in one giant and sinister scheme.