The village of Alvesdon has been home to the Castells for generations. But the year is 1939 and the peace and tranquillity there is about to be shattered once more by the stormclouds of war in Europe. As three generations of the family gather, they must all face the prospect of their lives being transformed beyond recognition the moment Britain declares war on Germany. When the inevitable happens and Britain finds itself at war, the younger members of the family and farm workers are called up to fight and those who remain must battle to keep the home fires burning and the farm afloat. The gentle certainties of rural life are replaced by the urgent clamour of war, in the air, at sea and on land, where events unfold with dizzying rapidity and unexpected consequences.