In gritty Glasgow, a police detective confronts criminals—as well as an enemy that lies within . . . In the seedy environs of 1980s Glasgow, Scotland, it takes guts to be a cop. DI Luc Kidston has guts—though he also has a weak spot thanks to his fear of heights. Now he must focus on finding a samurai sword–wielding vigilante—and untangling the case of one of his protégés, who’s been arrested for allegedly putting a woman into a coma. Solving both problems will lead Kidston to take some unorthodox steps, including hiring a forensic hypnotist. It will also bring him into conflict with his own colleagues and lead him to fight for his life in a terrifying showdown . . .

As DI Luc Kidston investigates the grisly murder of a prominent, openly gay prosecutor, he discovers that a friend of the victim died just a few weeks earlier—but botched police work resulted in a suicide ruling. When the case becomes a double murder inquiry, Kidston believes he may be tracking a serial killer. Now amid rising tensions within his team, Kidston’s family is targeted by a shady nightclub manager who blames the detective for interfering with his business. But Kidston’s attempts to lure a murderer out of the shadows, while also racing to free a loved one from captivity, will plunge him into darkness in a suspenseful and terrifying climax . . . Can Kidston crack the case and make it out in one piece?