In remote Sutherland, a 32-year-old father of two has been missing for 48 hours. Being a bushcraft expert, he went out with only a small amount of provisions and the clothes on his back. With little information about his planned route, the local officers unite with mountain rescue and coastguard to trawl the area, leaving no stone unturned. The weather was mild when the missing man set out, but the unpredictable Scottish weather is due to turn, with a blizzard on the way.Sixty miles away, in Thurso, a suspicious package smelling strongly of cannabis has been intercepted in the post, and it falls to Sgt Andy McKay and his team to investigate. With a warrant to search the address, the team get kitted up. In Inverness, roads police respond to complaints of antisocial driving at a nearby shopping centre, and a check on the system shows one of the culprits' vehicles already has an Asbo - but he is not ready to surrender.Elsewhere, a car containing two dead deer is pulled over, and it falls to wildlife officer Dan Sutherland and his team to investigate whether the driver is an illegal poacher.