Chris, a passionate trainspotter in his late 20s, and his best friend Graham, a charismatic but slightly reckless enthusiast, have spent years traveling Britain’s railways, documenting diesel locomotives and chasing the thrill of rare sightings.

Chris and Graham board a train from London to Inverness, their base for exploring remote Highland lines. The journey is filled with camaraderie, banter, and detailed observations of the trains they pass.

At a rural station en route, they overhear a cryptic conversation between two men about a “delivery” that must be “secured” before the “old beasts” (diesel locomotives) are scrapped. Graham dismisses it as railway gossip, but Chris feels uneasy

Strange occurrences start: their train is unexpectedly diverted, and they spot an unfamiliar locomotive hauling unmarked freight cars in the dead of night.

That night, Graham vanishes after heading out to photograph a late-night freight train. Chris finds Graham’s notebook, filled with cryptic references to “the last run” and a location called “Blackmoor Cutting.”

This story is a mystery thriller that intertwines the niche world of trainspotting with a high-stakes conspiracy, leveraging the unique setting of British Railways to drive both plot and atmosphere.