A remote shoreline. A lethal killer. The height of summer in Scotland. Small west-coast campsites are the go-to for wild campers and campervans. Remote, loch or beach-side, most occupy a field on a highland croft. No CCTV. Small overnight fee paid for in cash. Friendly and ideal if you long for solitude, beauty and safety. Until a lone camper disappears. Then another. It appears that a killer has found the perfect way to operate. Remote, unnoted and lethal. Meanwhile in Glasgow, Police Scotland is facing allegations of sexual assault by its male officers. Young women from all walks of life have come forward to reveal the names of their police attackers. In that list is one DS Michael McNab. Did McNab overstep the mark, or is the accusation against him a w ay of putting him out of action forever?