Angus MacVicar is a newly minted Detective Constable, eager to start his first day in his dream job.
He's even assigned to a big police operation - tracking down the 'Fortnight Killer' who's targeting couples in a Scottish city.
But when he finds himself paired with a cantankerous forensic psychologist on loan from the FBI - things go, well... downhill.
This story is the latest from the mind of best-selling Scottish author Stuart MacBride.
His first novel, Cold Granite, introduced fans to his Aberdonian Detective Logan McRae - another 15 followed - along with another three with Detective Ash Henderson, which are set in the fictional Scottish town of Oldcastle.
That's where this latest work, A Place of Darkness, is also set.
Kathryn speaks to him about why he cares about his characters, what makes a good killer and what's truly scared him.