The Mistress of Shenstone.

The husband of Lady Myra Ingleby is off fighting in the World War. She is devastated when Sir Derysk Brand tells her that her husband has been killed. The War Office gives her the details - Lord Ingleby was killed, not by enemy fire, but because of an error committed by one of his fellowmen, whose name is never to be disclosed. The grieving widow retreats to her Cornwall estate for a rest. Staying at the inn is a man known as Jim Airth, who carries a grief of his own.