In March 1933, just three months after Adolf Hitler became Chancellor, Eisner fled Berlin to Paris where a sister lived. Here she lived precariously taking any job she could find (translating, babysitting etc) and working whenever possible as a freelance film critic for a variety of international journals and newspapers. In 1940, she was rounded up in the first "Rafle du billet vert" and taken to the Vel d'Hiv with hundreds of other single Jewish women. From there they were transported to Gurs internment camp in the Pyrenees, a concentration camp run by the French for the Germans. After a few months, she managed to escape and travelled to Montpellier where she enrolled briefly as a student before finding her way to Rodez and to Pastor Exbrayat who helped her to obtain false papers - she became Louise Escoffier from the Alsace region. She remained in touch with Henri Langlois, who was in Paris, and was secreting cans of film around the country to keep them out of the hands of the Nazis. One of those places was near Figeac in central France, in the cellars of Château de Béduer. Langlois instructed Eisner to go there to preserve the films (including "The Great Dictator"). Eisner accomplished this in freezing cold conditions for a month before running out of money. In need of help, she managed to gain a job in a girls school in Figeac. Badly treated, she began to teach German to some Spanish girls living with the local school teacher Madame Guitard, who took her in; she stayed there until the liberation of Paris in late August 1944.