When a member of the Police Scotland team fails to clock-in for work, concern for her whereabouts is immediate... and the discovery of her burnt-out car in remote woodland to the south of Edinburgh sets off a desperate search for the missing woman.

Meanwhile, DCI Tony McLean and the team are preparing for a major anti-corruption operation - one which may raise the ire of more than a few powerful people in the city. Is Anya Renfrew's disappearance a co-incidence or related to the case?

McLean's investigations suggest that perhaps that Anya isn't the first woman to have mysteriously vanished in these ancient hills. Once again, McLean can't shake the feeling that there is a far greater evil at work here...