The Red Cross is on a humanitarian mission to locate missing oil worker Calum Mackenzie.

RB McGehee, second-tier reporter with Global Press's two-man Edinburgh bureau, files a couple of paragraphs for the US wire agency and expects to hear nothing further.

There are in any case bigger fish to fry: Scotland has unveiled unilateral carbon reduction measures, a diplomatic hoo-ha with Norway threatens to escalate into what the locals would call a proper stooshie, and Frankfurt HQ is cracking down on expenses.

The story, however, refuses to go away. And McGehee – risking life, love and career – is entangled in a desperate race against time to solve the riddle of what happened to the experimental drilling platform Sligachan 6.

S6: AN RB MCGEHEE SCOOP follows McGehee's investigations as he visits oil companies, government offices and whistle-blowers. Closed doors turn to violent responses the closer McGehee gets to the truth.