August 1939. Maude writes from London just weeks before the start of the war. Maude and her sister witness a practice flyby of England’s Royal Air Force and also a practice Blackout. In addition, they visit London’s Portrait Gallery and the British Museum with their mother before she returns to France on an assignment to the Louvre Museum in Paris. The girls do not know it, but their mother will be part of a secret mission to hide away the treasures of the Louvre in advance of the imminent war.