Spain, 2020. When expat fugitive Jack Cleland catches hirlfriend die, gunned down in a pursuit involving officer Cristina Sánchez Pradell, he promises to exact his revenge by destroying the policewoman. Cristina's aunt Ana has been deaf-blind for the entirety of her adult life : the victim of a rare condition called Usher Syndrome. Ana is the centre of Cristina's world — and of Cleland's cruel plan.
John Mackenzie — an ingenious yet irascible Glaswegian investigator — is seconded to aid the Spanish authorities in their manhunt. He alone can silence Cleland before the fugitive has the last, bloody, word.
