A sinister murder mystery draws DI Ruth Calder (Ashley Jensen) and DI Alison 'Tosh' McIntosh (Alison O'Donnell) to a remote Shetland village in the tenth series of this acclaimed detective drama. The body of an elderly woman has been found, left out in the elements for several days. On the surface, this is the brutal murder of a vulnerable resident. But there is something else.

This is more than a killing. It feels like a punishment. The close-knit locals are quick to blame outsiders but are unable to explain how the victim went undiscovered for so long. As Calder and Tosh begin to unravel a complicated web of lies, a picture begins to form of a community far less peaceful than it seems - and a personal link to the case for one of the team will test loyalties to the limit...