Subtitled: How Danny Rook got spirited away, found the coldest place in the Cold War, tried to stop everything hotting up, and discovered that he was expendable.
It is now the summer of 1975 and, in the north of Finland, the forests are in trouble… trees, animals, bugs are dying off. And just across the border, inside Russia, a huge arrow-shaped structure has showed up on satellite imagery. But the photos are too oblique and too shaded by clouds for the photo-reconnaissance analysts to work out what’s going on. NATO needs to take a look at this weird arrow from ground level. But whom can they send? Someone resourceful… someone with the right knowledge… someone who isn’t on a government payroll… Someone expendable? It could just be time to send for Danny Rook. But where is he? Meanwhile, university arboriculturists think they know what’s causing the forests to die back, so they want to get a look inside Russia too…"