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 life: 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.

A man stands bewildered on a deserted beach on the Hebridean Isle of Harris. He cannot remember who he is. The only clue to his identity is a folded map of a path named the Coffin Road. He does not know where this search will take him. A detective from Lewis sits aboard a boat, filled with doubt. DS George Gunn knows that a bludgeoned corpse has been discovered on a remote rock 20 miles offshore. He does not know if he has what it takes to uncover how and why.

Cambodia, 1978. Amid the Khmer Rouge's crazed genocide, soldier of fortune Jack Elliott is given the impossible task of rescuing a family from the regime. Eighteen-year-old orphan and budding journalist Lisa Robinson has received the impossible news that her father is, in fact, alive. His name - Jack Elliott. As Jack tracks the hostages and Lisa traces her heritage, each is intent on reuniting a family. Yet to succeed, so must run a dangerous gauntlet of bullets and betrayal.

A brutal killing takes place on the Isle of Lewis, Scotland: a land of harsh beauty and inhabitants of deep-rooted faith. Detective Inspector Fin Macleod is sent from Edinburgh to investigate. For Lewis-born Macleod, the case represents a journey both home and into his past. Something lurks within the close-knit island community. Something sinister.

When Detective Sime Mackenzie boards a light aircraft at Montreal's St. Hubert airfield, he does so without looking back. For Sime, the 850-mile journey ahead represents an opportunity to escape the bitter blend of loneliness and regret that has come to characterise his life in the city. Travelling as part of an eight-officer investigation team, Sime's destination lies in the Gulf of St. Lawrence. Only two kilometres wide and three long, Entry Island is home to a population of around 130 inhabitants - the wealthiest of which has just been discovered murdered in his home.