Assistant Chief Constable Bob Skinner's legendary cool is shaken when he's faced with the bodies of his wife's parents, who have been brutally murdered. At the death scene in New York state, Skinner's out of his jurisdiction, but he's not going to let that stop him shaping the investigation.
Soon it's clear that there's a killer hunting down a group of men with links that go back to the 1960s, and that he's acting on instructions from highly placed sources. But just how high?
Meanwhile, back in Edinburgh, Detective Superintendent Maggie Rose and her husband, Mario, divisional CID commander, could soon bring their days in the police force crashing to a halt. And Skinner's not on hand to give advice.