For the citizens of Sitting Marsh, a munitions factory is not merely a blemish on their country village, but a target for the Luftwaffe. Elizabeth manages to quell the fears of the locals - and inflame their patriotism about contributing to the war effort. Unfortunately, patriotism isn't the only thing to get ignited - as the factory explodes, killing owner Douglas McNally. The fire warden rules it an accident, but Elizabeth knows McNally received threatening letters demanding he close the factory - and where there's smoke, there's fire...