In Joe and Kate Keller''s family garden, an apple tree - a memorial to their son Larry, lost in the Second World War - has been torn down by a storm. But his loss is not the only part of the family''s past they can''t put behind them. Not everybody''s forgotten the court case that put Joe''s partner in jail, or the cracked engine heads his factory produced which caused it and dropped twenty-one pilots out of the sky ...