After nine months of self-imposed isolation following his wife's departure, the hero of Seven Terrors finally decides to face his loneliness and join the world once more. However, when the daughter of his old friend Alex appears in his flat one morning with the news that her father has disappeared, he realises that his life is again about to change. As the two search for clues in Alex's war diary, unearthed in a library in Sweden, they come upon tales of unspeakable horror and mystery: meetings with ghosts, a town under siege, demonic brothers who ride on the wings of war, and many more things so dangerous - and so precious - that they can only be discussed by the dead.