Tim appears to have had an exciting war, but is fairly secretive about what he had been up to. He lives in a sleepy village with his mother Liz, who is concerned about him not least because he is equally unforthcoming about the job he has in London. Meanwhile, the local choir rehearses, but there are sinister undercurrents and not all of its seemingly respectable members may be have been entirely honest about their past. Then a house in the village explodes, killing the occupant with whom Tim ha