The Key In The Lock by Beth Underdown

I still dream, every night, of Polneath on fire. Smoke unfurling out of an upper window and a hectic orange light cascading across the terrace.

By day, Ivy Boscawen mourns the loss of her son Tim in the Great War. But by night she mourns another boy - one whose death decades ago haunts her still.

For Ivy is sure that there is more to what happened all those years ago: the fire at the Great House, and the terrible events that came after. A truth she must uncover, if she is ever to be free.