Everyone is searching for Billy Brogan and his sister, Marianne. Marianne's ex-husband Kenneth Scott is gunned down in his home and two men are found dead in Billy's West End flat. But Billy is on the run to Spain, with the money that was meant to pay the hit man who killed Kenneth. Now the hit man remains in Glasgow, seeking not just his fee for his job but the elusive Marianne. The woman has been a mature student of Dr Solomon Brightman, psychology lecturer at Glasgow University and criminal profiler. Why, when she meets him unexpectedly in a Glasgow bookshop, does she tell him she owes him such a lot? And what is her relationship to Amit, the educated Pakistani refugee from Lahore? DCI Lorimer is given the news that psychological profiling is no longer allowed following a case of wrongful arrest down South, but can his friendship with Solly produce the necessary clues in this case? And will Solly be able to find his missing student before time runs out for her?