On the Isle of Skye, experienced climber Frank has gone missing in the mountains. As the weather closes in, police desperately search for clues to discover his exact route.

The county lines drug epidemic has taken further hold in Inverness, bringing increased violence and drugs deaths. Specialist CID officers bust down doors in search of the gangs.

Detectives race to the scene of a violent attack on an island in the Hebrides, cops settle a dispute between two crofters, and an arrest is made in Shetland for a hate crime.

Officers in Kyle of Lochalsh conduct a search warrant on a flat of an elderly neighbour who they suspect is dealing Class A drugs.

Cops search for a young man lost in the foothills of the Cairngorms. In Inverness, a shocking hit-and-run sparks a hunt for a man and woman on a violent crime spree.

Torrential rain hits the Highlands, flooding roads and fields. As conditions worsen, a missing person search becomes a desperate manhunt.