Spain, 2020. When expat fugitive Jack Cleland watches his girlfriend die, gunned down in a pursuit involving officer Cristina Sanchez 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 the victim of a rare condition named 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.

Peter May's latest bestseller unites a strong, independent Spaniard with a socially inept Scotsman; a senseless vendetta with a sense-deprived victim, and a red-hot Costa Del Sol with an ice-cold killer.