A pair of children befriend an eccentric old man, who lives isolated on the far shore of their island home. But it turns out that the old man knows a terrible secret about the island and the whales who sometimes come. Meanwhile WWI is making life hard in the village.

Barley Scott Blair, a Lisbon-based editor of Russian literature who unexpectedly begins working for British intelligence, is commissioned to investigate the purposes of Dante, a dissident scientist trapped in the decaying Soviet Union that is crumbling under the new open-minded policies.